Estimate to the nearest integer.
21
O 3
O 4
O 5

Answers

Answer 1

Answer:

Step-by-step explanation:

So the square root of 21 is 4.582...

If you round 4.582.. it is 5

Because you look at the first number behind the decimal (tenths place) if it is 4-0 you leave the number the same. If it is 5-9 you increase the number by 1.

Hope this helps ya!!

Related Questions

Solve for the value of x.

Answers

Answer:

x= 12

Step-by-step explanation:

The sum of both of the equasions equal up to 180. so you set up the problem like this:

(9x-4)+(6x+4)=180

15x=180

x=12

To check;

(9(12)-4)+(6(12)+4)=180

104+76=180

8x + 7y = 2
8x + 3y = 10

Answers

Answer:

what do you want from this question?

Step-by-step explanation:

A newborn baby what weighs 3⁷ kilograms. An adult blue whale weighs 81 times the newborn. How many kilograms does the adult bluewhale weigh? Write your answer as a power of 3.

Answers

Answer:

2187

Step-by-step explanation: 27 times 81 equals 2187

How much money is collected in tolls if 55 two axle cars cross the bridge? Type your answer in a
complete sentence.

Answers

Y•55=x

Step-by-step explanation:

Rewrite
barrel
as a unit rate.
hour

Answers

Answer:

B. 2/5 barrel/hour

Step-by-step explanation:

cross multiply 1/5 and 2/1

=2/5

Find the 87th term of the arithmetic sequence 12, 0, -12,

Answers

Answer:

- 1020

Step-by-step explanation:

The n th term of an arithmetic sequence is

[tex]a_{n}[/tex] = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 12 and d = a₂ - a₁ = 0 - 12 = - 12 , thus

a₈₇ = 12 + (86 × - 12) = 12 - 1032 = - 1020

Answer:

-1008

Step-by-step explanation:

How do I do this? I’m lost

Answers

Answer:

x=12

Step-by-step explanation:

3x+7=5x-17

2x=24

x=12

what is 6 plus6^2÷3

Answers

I believe the answer would be 18 sorry if im wrong

Write down the next two numbers in the sequence.

81, 64, 47, 30, ___, ___

Answers

Answer:

81, 64, 47, 30, 13, -4

Answer:

The next two numbers are 13 and -4.

Step-by-step explanation:

We are subtracting 17 each time.

30 - 17 = 13

13 - 17 = -4

As a nurse in a maternity ward, you are tracking the weights of newborn babies. In the month of August, 360 babies are born, with a mean weight of 8.1 pounds. In the month of September, 291 babies are born, with a mean weight of 7.8 pounds.

what, approximately, is the mean weight for babies born during the two-month.?

7.83 pounds

7.93 pounds

7.95 pounds

7.97 pounds

7.99 pounds

Answers

7.95 lbs because you have the mean of both months to get the mean of the two months take the two numbers 7.8+8.1/2 to get the mean of the two months

Answer:

Step-by-step explanation:

The speed of a train increases from 650 km/hr to 800 km/hr in 5 hours. What is its acceleration?

Answers

Answer:

\overline{a} = \frac{v - v_0}{t} = \frac{\Delta v}{\Delta t}

Step-by-step explanation

i do not really understand but use this formula

= average acceleration

v = final velocity

v_0 = starting velocity

t = elapsed time

A racecar is racing along a circular track. The car starts at the 3-o'clock position and travels CCW along the track. The car is constantly 8 feet from the center of the race track and travels at a constant speed and it takes the car 7.854 seconds to complete one full lap.

a. How many radians does the car sweep out per second? radians per second Preview

b. Write a function fthat determines the car's distance to the right of the center of the race track (in feet) in terms of the number of seconds t since the start of the race. f(t)

Answers

Answer:

a. The car sweeps out 0.799 radians per second.

b. f(t) = 8 cos (0.799t)

Step-by-step explanation:

Given that:

The radius r = 8 feet

The time t it takes to complete one full lap = 7.854 seconds

Recall that:

Angular velocity ω = 2π / t

So if in 7.854 seconds, the car sweeps = 2π radian

∴

per second, the car will sweep ω = 2π/ 7.854

ω = 0.799 rad/sec

Thus, the car sweeps out 0.799 radians per second.

Since, r = 8 feet.

Suppose the car travels an angle θ in time (t),

Then the general equation for the horizontal component is:

f(t) = rcos( ωt)

f(t) = 8 cos (0.799t)

The true statements are:

The car swept out [tex]0.255 \pi[/tex] radians per secondsThe function f that determines the car's distance at time t is: [tex]f(t) = 8\cos( 0.255\pi t)[/tex]

The given parameters are:

Radius = 8 feetTime = 7.584 seconds

(a) The radian swept per seconds

To do this, we simply calculate the angular velocity as follows:

[tex]\omega = \frac{2\pi}{T}[/tex]

Substitute 7.854 for T

[tex]\omega = \frac{2\pi}{7.854}[/tex]

Simplify

[tex]\omega = 0.255 \pi[/tex]

Hence, the car swept out [tex]0.255 \pi[/tex] radians per seconds

(b) The function at time t

To do this, we simply make use of the general equation for the horizontal component as follows:

[tex]f(t) = r\cos( \omega t)[/tex]

Substitute 8 for r

[tex]f(t) = 8\cos( \omega t)[/tex]

Substitute [tex]\omega = 0.255 \pi[/tex]

[tex]f(t) = 8\cos( 0.255\pi t)[/tex]

Hence, the function f that determines the car's distance at time t is: [tex]f(t) = 8\cos( 0.255\pi t)[/tex]

Read more about angular velocity at:

https://brainly.com/question/6860269

write the equation of the line in slope intercept form

Answers

(Y2-y1)/(x2-x1) is slope equation
Pick any two points (600,0) and (0,-600)
(-600-0)/(0-600) = -600/-600 = 1
y = x + b
Plot the points inside
0 = 600 + b
b = -600
Final equation: y = x - 600

Answer:

y = x - 600

Step-by-step explanation:

y = mx + b , "m" is slope and "b" is y-intercept

y - [tex]y_{1}[/tex] = m(x - [tex]x_{1}[/tex])

~~~~~~~~~~~~~

y-intercept is (0, - 600) and x-intercept is (600, 0)

The slope is 1

y + 600 = x - 0

y = x - 600

In a video game, the chance of rain each day is always 30%. At the beginning of each day in the video game, the computer generates a random integer between 1 and 50. Explain how you could use this number to simulate the weather in the video game

Answers

Answer: answer 80%

Step-by-step explanation:

Answer:

ew teachers really out here trying to make video games about school huh

Step-by-step explanation:

Can somebody plz answer all of them correct except number 7!!! Please thanks so much :) it’s my corrections :/
WILL MARK BRAINLIEST

Answers

i will help! i will also give you a tip.

Answer:

Number 8 is going to be 5/2

Number 9 is going to be 31/8

Number 10 is going to be 7/4

Number 11 is going to be 29/6

Number 12 is going to be 67/13

Step-by-step explanation:

Hope this helped

You spend $23 to spend on 4 avocados. After buying them you had $11. How much did each avocado cost? Write an equation about this.

Answers

Answer: Each avocado cost $3

Equation: 23 - 4x = 11

Answer:

$3 per avocados

Step-by-step explanation:

23-11= 12. 12 divided by 4 = 3

Help!
Find the distance between A and B .

Answers

Don’t know so count it because line graphs are not that hard

Answer:

2.6

Step-by-step explanation:

1.3-(-1.3)

1.3+1.3

2.6

Can anyone help me please ??

Answers

Answer:

c equal 11.40 Step-by-step explanation: c is the hypotenuse so under square root 9^2 +7^2

Answer:

√130 ≈ 11.4

Step-by-step explanation:

Pythagorean Theorem: a² + b² = c²

9² + 7² = c²

130 = c²

√130 = √c²

√130 = 11.4

Janna and Anthony walk home from school on Monday Wednesday and Friday their mother picks them up on Thursday and they ride the bus on Tuesday what fraction of time do they walk hom from school

Answers

Answer: 3/5

Step-by-step explanation:

Out of 5 school days, Janna and Anthony walk home on Monday, Wednesday and Friday.

This means they walk home on 3 days out of 5.

The fraction of time they walk home from school is;

= 3/5

What is the rate of inflation if an account has a nominal interest rate of 4.2% and a real interest rate of 2.8%
A. 1%
B. 1.8%
C. 2.4%
D. 1.4%

Answers

Answer:

Rate of inflation = 1.4%

Step-by-step explanation:

Given:

Nominal interest rate = 4.2%

Real interest rate = 2.8%

Find:

Rate of inflation

Computation:

Rate of inflation = Nominal interest rate - Real interest rate

Rate of inflation = 4.2% - 2.8%

Rate of inflation = 1.4%

Marcus can choose between a monthly salary of $1,500 plus a 5.5% commission of sales or $2,000 plus a 3% commission of sales. He expects about $8,000 in sales each month. Which salary option should he choose?

Answers

Answer:

The second option is better

Step-by-step explanation:

Total for the first choice:

8000*5.5/100 + 1500 = $1940

Total for the second choice:

8000*3/100 + 2000 = $2240

As we see the second choice is better as more salary is expected

Questlon 2 of 10
The amount of time between interest payments is known as:
A. simple interest.
B. interest.
C. principal.
D. period
SUBMIT

Answers

Answer: D) Period

You could refer to this as the time period. Usually the time period is in months. So you make monthly interest payments, often with the principal mixed in somewhat.

(7,-20), (1,-3)
Find the slope of the line through each pair of points

Answers

Use the equation m=y2-y1/x2-x1
Plug the coordinates in the equation
-3-(-20)/1-7
17/-6
The slope is -17/6

Answer:

-17/6

Step-by-step explanation:

You find the slope by using the equation: y2-y1/x2-x1.

-20-(-3)/7-1

-20+3/6

-17/6

witch 2 numbers are 4 units away from zero on a number line

Answers

Answer:

it depends which way youre going, but 4 and -4 work.

Step-by-step explanation:

Kaley and Tom both work at Publix as cashiers for $7.68 per hour. This week Kaley worked 5 more hours than Tom in overtime. Write an expression that represents the weeks' total wages for Kaley and Tom if h represents the number of hours Tom worked.

Answers

Answer:

7.68h

38.4 + 7.68h

Step-by-step explanation:

Earnings per hour = $7.68

This week Kaley worked 5 more hours than Tom in overtime

h = number of hours Tom worked.

Tom's total earnings for the week = earnings per hour × number of hours

= $7.68 × h

= 7.68h

Tom's total earnings for the week = 7.68h

Kayley's total earnings for the week = earnings per hour × number of hours

He works 5 hours more than Tom in overtime.

Tom = h

Kayley = 5 + h

Kayley's total earnings for the week = earnings per hour × number of hours

= (7.68) × (5 + h)

= 38.4 + 7.68h

Kayley's total earnings for the week =

38.4 + 7.68h

Find the length of BD in rectangle ABCD. a2 + b2 = c2 5 23 25 31

Answers

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

[tex]24^{2} + 7^{2}[/tex] = 625

[tex]\sqrt{625\\}[/tex] = 25

Therefore, the length of BD in rectangle ABCD is 25mm. I just did the test and it is correct. 23 is wrong.

Expand and simplify 3(2x + 1) +2(x + 4)

Answers

Answer:

8+11

Step-by-step explanation:

Answer:

3(2x + 1) +2(x + 4)

6x + 3 + 2x + 8

8x + 11

Step-by-step explanation:

What is -3(5+5)>5x?

Answers

Answer:

The answer is x < -6

hope that helps

-3(5+5)>5x

-15+-15>5x

-30>5x

5x<-30

Divide both side by 5

5x÷5 < -30÷5

x<-6

Answer:

-15 is the incorrect answer the correct answer is x < --6

Step-by-step explanation: Simplify 5+55+5 to 1010.

-3\times 10>5x−3×10>5x

2 Simplify -3\times 10−3×10 to -30−30.

-30>5x−30>5x

3 Divide both sides by 55.

-\frac{30}{5}>x−

30

 >x

4 Simplify \frac{30}{5}

30

 to 66.

-6>x−6>x

5 Switch sides.

x<-6x<−6

The function above models the height, y, in feet of a stone t seconds after it is dropped from the edge of a vertical cliff. How long will it take the stone to hit the ground? Round to the nearest hundredth of a second

Answers

Answer:

3.94 seconds

Step-by-step explanation:

h = - 16t² + 248

If stone is dropped, then h = 0

- 16t² + 248 = 0

t² = [tex]\frac{248}{16}[/tex]

t = ± [tex]\frac{2\sqrt{62} }{4}[/tex]

t < 0 is a solution of equation, but not a solution of the task

t = [tex]\frac{2\sqrt{62} }{4}[/tex] ≈ 3.94 seconds

Answer:

≈ 3.74 seconds

Step-by-step explanation:

Oops! The numbers I had to work with were "The function y = –16t2 + 224..."

Someone help I’ll give brainlist lol

Answers

19-8/7j

Hope this helps

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Estimate to the nearest integer. 21 O 3 O 4 O 5

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Estimate to the nearest integer.
21
O 3
O 4
O 5