Answer:
2x² + 2x +3x +3= 2x² + 5x + 3
helppp :))) i- wasnt listening
Answer: 130 cm
Step-by-step explanation:
Let's take the equation for the volume of a rectangular prism
V=Length * Width * Height (L*W*H)
[tex]V=W*L*H[/tex]
V=2*13*5
[tex]V=2*13*5[/tex]
V=130 cm
[tex]V=130cm[/tex]
jose is now six years older than john. in two years jose will be twice as old as john. How old is john now.
Answer:
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣤⣤⣤⣤⣤⣤⣤⣤⣄⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣴⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣶⣤⡀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣦⡀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢀⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⣸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠿⠿⠛⠛⠛⠛⠿⠿⣿⣿⣷⣄⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠻⣿⣷⠀⠀
⠀⠀⢀⣠⣤⣴⣶⣶⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣇⠀
⠀⢀⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣶⣤⣤⣤⣤⣤⣤⣤⣤⣴⣶⣿⣿⡿⠀
⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠃⠀
⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠁⠀⠀
⠀⣸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀
⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀
⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀
⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠀⠀⠀
⠀⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀
⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀
⠀⠀⢿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠀⠀⠀⠀
⠀⠀⠀⠙⠿⠿⠿⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠿⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⡄⠀⣿⣿⣿⣿⣿⣿⣿⣿⣿⡇⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⢐⣿⣿⣿⣿⣿⣿⣿⣿⣿⠃⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⣿⣿⣿⡿⣟⣯⣿⠟⡉⠉⣿⣿⣿⣿⣿⣿⣿⣿⣿⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠻⢿⣽⣿⣿⣿⠿⠿⠟⠒⠉⠉⠉⠉⠉⠉⠉⠙⠋⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠿⠋⠉⢀⣠⣤⣤⡔⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣴⠾⠛⠋⠉⠀⢀⣀⠐⣤⣶⣶⡤⢤⣤⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣤⣰⣶⣾⣿⣿⣿⣆⠀⣀⣀⡀⣀⡀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠉⠉⠀⢀⢀⣀⠀⣀⣈⡿⠿⠿⠽⠃⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠛⠛⠿⠿⠿⠿⠾⠟⢁⣀⡴⣦⠆⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢦⣤⣀⣀⠀⠀⠀⠀⢘⣿⣍⡷⠆⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢶⣄⠈⠉⠛⠛⠿⠓⠀⠉⠋⠉⣀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣧⡀⠙⠻⢶⣶⡤⠀⠀⠛⠶⠾⠼⠋⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣆⠈⠻⣶⣤⡀⠀⠀⢸⠿⣶⣦⣤⣠⣾⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⠙⢷⣤⣀⠈⠁⠀⠀⢠⣤⣀⠈⠉⠈⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡌⢧⣀⠉⠛⠃⠀⠀⠀⠀⠉⠛⠿⠿⠻⠃⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠰⢳⣄⠙⠛⢋⠁⠀⠀⠀⠘⠿⣴⣤⣄⣤⡄⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣄⡙⠛⠋⠀⠀⠀⠀⠀⠰⣤⣀⠉⠉⠉⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⢠⡈⠉⠉⠀⠀⠀⠀⠀⠀⢀⡈⠙⠛⠛⠛⠁⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⢦⡉⠛⡁⠀⠀⠀⠀⠀⠀⠈⠻⠷⣶⣦⡆⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢠⡈⢷⣌⠙⠛⠁⠀⠀⠀⠀⠀⠀⠰⣦⣄⣀⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠈⢷⣄⡉⠛⠛⠀⠀⠀⠀⠀⠀⠀⢀⠈⠙⠛⠛⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢦⣀⠉⠛⠷⠖⠀⠀⠀⠀⠀⠀⠀⠘⠿⣶⣦⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⣠⣀⠙⠳⠶⠶⠀⠀⠀⠀⠀⠀⠀⠀⢠⣀⣀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠙⠻⢿⣶⣤⣤⠀⠀⠀⠀⠀⠀⠀⢠⠛⠛⠻⠿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠰⣦⣄⠈⠉⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⢹⣿⣿⣶⡆⠀⠀⠀⠀⠀⠀⠀⠺⠿⠿⠿⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⠻⠟⠁⠀⠀⠀⠀⠀⠀⢀⣤⣤⣤⣤⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⣀⣀⣀⣀⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠛⠛⠻⠿⠿⠧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⣞⣻⣿⣿⣔⣿⠂⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠛⠋⠉⠉⠁⠀⠀⠀⠀
Step-by-step explanation:
Answer:
John is currently 6 years old.
You can find this by setting John's original age as x and Jose's original age as x + 6. Then we can set up an equation adding two to both.
John's new age = x + 2
Jose's new age = x + 8
Now we can multiply John's new age by two and set equal to Jose's age, since Jose's new age is twice as much as John's.
2(x + 2) = x + 8
2x + 4 = x + 8
x + 4 = 8
x = 4
This means John's original age is 4 and his new age is 6.
Step-by-step explanation:
can somebody please help me, this is due in 20 minutes
Answer:
61°
Step-by-step explanation:
In order for triangle LMN and PQR to be congruent, angle M and angle Q must equal. thus, we can set 2x-26=x+16
with basic algebraic manipulation, x=42. we then plug it back into the angle M or Q, getting angle M/Q= 58°
since this is a isoceles, the 2 base angle are identical, so 180= 58+2(angle P)
thus, angle P= 61
A 12-ounce box of cereal costs $3.60. Which equation correctly relates the price (p) with the weight (w) of the cereal?
Answer:
A. P = 3.3w
Step-by-step explanation:
A. P = 3.3w
B. P = 0.3w
C. P = 3.6w
D. P = 12w
P = price of the cereal
w = weight of the cereal
p = $3.60
w = 12-ounce
3.60p = 12w
Divide both sides by 3.60
3.60p / 3.60 = 12w / 3.60
P = 3.3w
The correct answer is A. P = 3.3w
A fmaily wants to rent a van for a four day camping trip. The rental cost is $32.00 per day plu s$0.15 per miles driven. Their vacation budget allows them to spend $225.00 to rent the van. Which expression represents the number of miles that they can drive without going over their budget?
Answer:
The expression is: (225 - (32 × 4))/0.15
Steps:
first we'll calculate the rental cost of 4 days without the miles driven
32 × 4 = $128.00
now we'll calculate the money that can be spent on miles
225 - 128 = $97.00
with $97.00 they can drive: 646.66 miles
97 / 0.15 = 646.66 miles
The expression is: (225 - (32 × 4))/0.15
The top five test scores in Mr. Rhodes’s class were: 98, 92, 96, 97, and 97. What is the mean absolute deviation?
Answer:
A
Step-by-step explanation:
Can someone help me please? I keep getting this wrong. Match the reasons for the statements. Thank you!
Answer:
Step-by-step explanation:
Given is 1
Corresponding angles Postulate is 2
Substitution is 4
Same side theorem is 3
What is MCAD
A. 25
B.90
C.100
D.115
Please help!!!!
Answer:
D.115
Step-by-step explanation:
Use the exterior angle of a triangle theorem which states that the exterior angle of a triangle is equal to the sum of the opposite interior angles meaning D=C+B
Barry carefully measured all three sides of the triangle and the dimensions were as follows: 7 meters, 8 meters, 10 meters. Was it a Right Triangle? Please help!
Answer: Not a right-angled triangle
Step-by-step explanation:
Given
The sides of a triangle are [tex]7\ m, 8\ m, \text{and}\ 10\ m[/tex]
For a right-angle triangle, it must satisfy the Pythagoras theorem
[tex]a^2+b^2=c^2[/tex]
i.e. the square of the larger side must be equal to the sum of the square of the remaining two sides
Here,
[tex]\Rightarrow 7^2+8^2\ ?\ 10^2\\\Rightarrow 49+64\ ?\ 100\\\Rightarrow 113\neq 100[/tex]
Therefore, it is not a right-angle triangle
I need to find the angle for each number spot
Can I find the scale factor for a point with 2 different scale factors? (one for the x-axis and one for the y-axis)
Answer:
Yes
Step-by-step explanation:
Scale factor is the ratio of the length of one side of a point/figure to a similar side in another point or figure.
The scale factor can either be less than one(1) or greater than one(1) depending on the figure/ point you begin from when finding the scale factor.
Hence you can find the scale factor for a point with 2 different scale factors
HELP ME ASAPPPP PLEASE HLEPPPPPO
Answer:
14800 sq yd
Step-by-step explanation:
area of a trapeziod
Write an equation for each circle
1. center (-1,-5);r = 2 units
3. center (-8, 7); r = 12 unit
5. center (0.5, 0.7); r = 13.5 unitsand
Plssss i need your helpppp huhuhu
Answer:
136 cm²
Steps:
LA = π × 8 × √(15²+8²)
LA = π × 8 × √(225+64)
LA = π × 8 × √(289)
LA = π × 8 × 17
LA = π × 136 cm²
Betty wants to put new cabinets in her kitchen. She measures one side of her kitchen and finds it measures 18 meters. Which measurement did Betty find?
Answer:
A. Length
Step-by-step explanation:
Betty wants to put new cabinets in her kitchen. She measures one side of her kitchen and finds it measures 18 meters.
Which measurement did Betty find?
A. Length
B. Perimeter
C. Area
The measurements Betty found is the length of the cabinet
A side of the cabinet is equivalent to the length of such cabinet
To find the perimeter of the cabinet, it requires the addition of all the sides of the cabinet.
To find the area of the cabinet, it requires the multiplication of two different sides of the cabinet.
Therefore, Betty has only measured the length of the cabinet
Hans wanted to find the length of the hypotenuse of the triangle. Which statement correctly identifies his error?
A right triangle has side lengths 40 centimeters and 9 centimeters. The hypotenuse is labeled c.
9 squared + 40 squared = c squared. 81 + 80 = c squared. 161 = c squared. StartRoot 161 EndRoot centimeters = c.
He did not square 40, he just multiplied by 2.
He did not finish the problem. He should have divided 161 by 2 to find the square root.
He should have added 9 + 9 to find the value of 9 squared.
He should have subtracted the two squares to get 40 squared minus 9 squared = c squared because numbers get too large if both legs are squared and then added together.
Answer:
He did not square 40, he just multiplied by 2
Answer 41 centimeters.
Step-by-step explanation:
C²=40²+9²
C²=1600+81
C²=1681
√c²=√1681
C=41cm
Answer:
the answer is A
Step-by-step explanation:
edg
[tex][Inequalities][/tex]
[tex]Please[/tex] [tex]help[/tex] [tex]and[/tex] [tex]thanks.[/tex]
Answer:
1+X < 52
6 < Y- 4
Step-by-step explanation:
btw y did u report me on
https://brainly.com/question/22537441
Simplify (2i-1)(i^2-3i-7)
Answer: 14-13i
Step-by-step explanation:
Answer:
14 - 13i
Step-by-step explanation:
We MUST do the work inside parentheses before anything else.
Step 1: evaluate i^2: (2i-1)(i^2-3i-7) = (2i-1)(-1 -3i -7)
Step 2: combine like terms inside the parentheses: (2i-1)(-8 - 3i)
Step 3: perform the indicated multiplication of binomials:
-16i + 6 + 8 + 3i
Step 4: combine like terms of the above expression: 14 - 13i
antonio and emilia are painting a room in their new house. antonio could finish the job in only 6 hours by himself, while emilia could finish the job in only 4 hours by herself. how long would it take them if they worked together?
Answer:
Step-by-step explanation:
Antonio’s rate is 1/6 while Emilia’s rate is 1/4 while working alone, together they will complete the job when.
t/6+t/4=1 making common denominators
(t/6)(2/2)+(t/4)(3/3)=1
(2t+3t)/12=1
5t=12
t=2.4 hours (or 2 hours and 24 minutes)
Pls help! brainliest if correct and 50 points awarded! look at the image! :)
Answer:
A and D
Step-by-step explanation:
In a race , Ram covers 5 km in 20 min. How much distance will he cover in 100 min ? ( 348919)
Answer:
Ram will cover 25 km in 100 min's
Step-by-step explanation:
Hope this helps (^w^)
Answer:
hello :> UvU
Step-by-step explanation:
Hey guys 25 points and brainliest!
Answer:
9.1 = a + 4
Step-by-step explanation:
This is right? Isn’t it???
The area of the triangular base of the prism above is 9 cm2. The height of the prism is 11 cm.
What is volume of the prism?
A.99 cm3
B.891 cm3
C.1,089 cm3
D.29 cm
PLEASE HELP!!!!! Much appreciated!
Answer: B
Step-by-step explanation: first you have to find the square root of 9 (81) then multiply that by 11 which is 891
find the area of the semi circle please
Answer:
58.4197cm^2
Step-by-step explanation
cirlce area formula: [tex]\pi[/tex]r^2
r= 6.1
[tex]\pi[/tex]=3.14
Now plug numbers into the formula
area of circle:
= (3.14)(6.1^2)
=(3.14)(37.21)
= 116.8394cm^2 ------> area of full circle
now divide by 2, to find area of semi circle
116.8394/2= 58.4197cm^2
[tex] \huge\fbox\red{A}\fbox\pink{n}\fbox\purple{S}\fbox\green{w}\fbox\blue{E}\fbox\orange{r}[/tex]
area of semicircle is 58.572 m²
[tex] \huge \sf { \fcolorbox{green}{g}{Explanation :- }}[/tex]
[tex] \huge \underline{\large \fbox \red{Concept : }}[/tex]
We have to find the area of semicircle
So firstly we need to find the area of circle. because the semicircle of circle is the half of area of circle so first we find the area of circle then divide by 1 /2 then we get the area of semicircle.
We have given the radius of circle is 6.1 m
[tex]\huge\mathfrak\red{Solution : }[/tex]
[tex] \mathfrak \green{Area \: of \: circle = π × ( radius) ²}[/tex]
[tex]\mapsto \: \: \small \: \: \: \: \: \mathfrak \blue{ = \frac{22}{7} \: \times( 6.1 \: m)^{2} } \\ [/tex]
[tex]\mapsto \small \: \: \: \: \: \mathfrak \blue{ = \frac{22}{7} \: \times37.21 \: m {}^{2} } \\ [/tex]
[tex]\mapsto \: \small\: \: \: \: \: \: \mathfrak \blue{ = 116.94 \: m {}^{2} }[/tex]
Therefore,
[tex]\small \mathfrak \red{Area \: of \: semicircle = \frac{1}{2} \times area \: of \: circle}[/tex]
[tex] \small \mathfrak \green{ = \frac{1}{2} \times 116.94 \: cm \: {}^{2} } \\ [/tex]
[tex]\mapsto \: \small\: \: \: \: \: \: \mathfrak { = 58.472\: m {}^{2} }[/tex]
[tex] {\underline {\fbox\red{Hence, the area of semicircle is 58.572 m²}}}[/tex]
WILL GIVE BRAINLIEST!
Find x given y = 28° from the figure below.
x =
[tex]5x + x + y + 2x = 180 \\ y = 28 \\ 5x + x + 28 + 2x = 180 \\ 8x + 28 = 180 \\ 8x = 180 - 28 \\ 8x = 152 \\ x = 19[/tex]
I need to get in helppppppppppp
#9
CAN U PLS ANSWER WILL GIVE BRAINLIEST
Answer: 20 hrs
Step-by-step explanation:
Last year Rikki sang 960 songs with his rock band. How many songs did he sing per month? How did you get your answer?
Answer:
80 songs per month.
Step-by-step explanation:
There are 12 months in a year
So you do 960 divided by 12 to see how many songs he sang per month
And you get 80.
A silk worm grows twice asd long as it was the day before .If the worm measures v40 mm on the 10 th day, on which day was it 2.5 mm long
Answer:
On the sixth day (10 - 4), the worm was 2.5mm long.
Step-by-step explanation:
Giving the following information:
Future Value= 40mm
Present Value= 2.5mm
Number of periods (n)= ?
Growth rate= 100% per day
First, we need to calculate the number of days it will take to grow from 2.5mm (PV) to 40mm (FV):
n= ln(FV/PV) / ln(1+i)
n= ln (40 / 2.5) / ln (2)
n= 4
It will take 4 days.
On the sixth day (10 - 4), the worm was 2.5mm long.