A coastal geologist estimates that a certain country's beaches are
eroding at a rate of 1.5 feet per year. According to the geologist's estimate,
how long will it take, in years, for the country's beaches to erode by 21 feet?
A. 14 years
B. 31.5 years
C. 28 years
D. 16 years​

Answers

Answer 1
21/1.5=14

14 years to erode

Related Questions

Rewrite the equation below so that it does not have fractions.
5/6x+2= 7/8
Do not use decimals in your answer.

Answers

Answer:

20x=-27 standard form or

20x+27=0 for implicit form

Step-by-step explanation:

Describe how to round 3.897 to the nearest tenth

Answers

Answer:

To round 3.897 to the nearest tenth consider the hundredths’ value of 3.897, which is 9 and equal or more than 5. Therefore, the tenths value of 3.897 increases by 1 to 9.

3.897 rounded to the nearest tenth = 3.9

what is the measure of the missing angle ​

Answers

Answer:

82.1

Step-by-step explanation:

a triangle will always be 180° so you add the numbers you have already and subtract them from the total

41.2 + 56.7 =97.9

180-97.9= 82.1

You estimate there to be 597 students in the school. There are actually 624 students in the school. What is the percent error?

Answers

i’d say you would subtract the numbers and get 27, but i’m not sure.

Solve for the value of v

Answers

Answer:

v=31

Step-by-step explanation:

CAN YOU HELP ME PLSSSSSSSSSSSSSSSSSSSSS

Answers

Answer: p + 8

Step-by-step explanation:4+ (p +7) - 3

You do 4+7-3=8+p

Round 39.472 to the nearest tenth​

Answers

The answer is 39.470 because 39.472 is far from 39.450 and it’s 2 numbers passed 39.470.

I will give BRAINLIEST

Answers

i would go with choice D

What is the measure of DBE?
A. 1200
B. 60°
C. 1800
D. 140°
E. 1000

Answers

Answer: I am pretty sure the answer is A, 120.

Step-by-step explanation:

What is the simple interst on $32,000 at 7% interest for 6 months

Answers

Answer:

1120$

Step-by-step explanation:

Total Intrest/By 7%

Answer:

$1,120 hope this helps!

Step-by-step explanation:

-4 + 8m + 9 - 3m help plssd

Answers

Answer:

5m + 5

Step-by-step explanation:

Combine like terms (terms with like & the same amount of the variable).

Set the equation:

(8m - 3m) + (9 - 4)

Simplify by combining like terms:

(8m - 3m)  = 5m

(9 - 4) = 5

5m + 5 is your answer.

~

Answer:

5m+5

Step-by-step explanation:

Hi. I need help with these questions (see image)
Please show workings.

Answers

Answer:

see explanation

Step-by-step explanation:

Using the chain rule

Given

y = f(g(x)), then

[tex]\frac{dy}{dx}[/tex] = f'(g(x))  × g'(x) ← chain rule

and the standard derivatives

[tex]\frac{d}{dx}[/tex] ([tex]log_{a}[/tex] x ) = [tex]\frac{1}{xlna}[/tex] , [tex]\frac{d}{dx}[/tex](lnx) = [tex]\frac{1}{x}[/tex]

(a)

Given

y = [tex]log_{a}[/tex][tex]\sqrt{(1+x)}[/tex]

[tex]\frac{dy}{dx}[/tex] = [tex]\frac{1}{lna\sqrt{(1+x)} }[/tex] × [tex]\frac{d}{dx}[/tex] ([tex](1+x)^{\frac{1}{2} }[/tex]

   = [tex]\frac{1}{lna\sqrt{(1+x)} }[/tex] × [tex]\frac{1}{2}[/tex] [tex](1+x)^{-\frac{1}{2} }[/tex] × [tex]\frac{d}{dx}[/tex] (1 + x)

   = [tex]\frac{1}{lna\sqrt{(1+x)} }[/tex] × [tex]\frac{1}{2\sqrt{(1+x)} }[/tex] × 1

   = [tex]\frac{1}{2lna(1+x)}[/tex]

   = [tex]\frac{1}{(1+x)lna^2}[/tex]

(b)

Given

y = ln sinx

[tex]\frac{dy}{dx}[/tex] = [tex]\frac{1}{sinx}[/tex] × [tex]\frac{d}{dx}[/tex](sinx)

   = [tex]\frac{1}{sinx}[/tex] × cosx

   = [tex]\frac{cosx}{sinx}[/tex]

   = cotx

Madison is going to hike to the point (4,4) on the coordinate grid, which is the top of the

mountain shown.

7

6

5

2

0

1 2 3 4 5 6 7 8

What is the approximate total distance Madison travels while she moves up the mountain?

o

16

o

5.66

32

8.34

Answers

Answer:1212321312Step-by-step explanation:

2131313

2, 8, 7, 8, 6, 15, 6, 3, 8
What is the range of the data?
A. 2
B. 6
C. 8
D. 13
E. 15

Answers

Answer:

13 or d

Step-by-step explanation:

The range of the data is D. 13

Given that,

The sequence is 2, 8, 7, 8, 6, 15, 6, 3, 8

Calculation:

The range is

= Highest number - lowest number

= 15 -2

= 13

Learn more about the range here: https://brainly.com/question/4135956?referrer=searchResults

how do i solve 6x+2y= 8

Answers

Answer:

The correct answer is,

for X:

[tex]x = \frac{4 - y}{3} [/tex]

for y:

[tex]y = 4 - 3x[/tex]

Bobby has $125 to spend. Used video games
are $15.50 each. Write an equation Bobby
could use to find out how many games he can
afford to buy? Use the variable x

Answers

Answer:

he can buy 8 video games

Step-by-step explanation:

125/15.50=8.06

hope this helps

pl make me brainliest

Graph the inequality X+6y<6

Answers

Answer:

can i see the picture?

What is m<1?
Show work you don’t have to but if you want to you can?

Answers

Answer:

m<1=88

Step-by-step explanation:

The two inside angles add up to the outside angle, so 44+44=88

The answer would be m<1=88

Dana and Abby both visited their grandparents this week,
-Dana visits her grandparents every 4 weeks.
-Abby visits her grandparents every 6 weeks.
What is the fewest number of weeks that will pass before both girls visit their grandparents again in the same week?
**I will Mark BrainIest- I only have 6 minutes left please help!!**

Answers

Answer:

10 i think because I added them i don't know though I hope it work sorry

Complete the following
a)
3/5 = ./20
b)
./6=25/30

Answers

Answer:

a)12/20

because 5 × 4 = 20 so, 3 also needs to multiply by 4

b)5/6

because 30 ÷ 6 = 5, and 6 × 5 = 30,so, 25 needs to ÷ with 5

A) 12/20
B) 5/6
Need to multiply the numerator by the same multiplication as the denominator

need help asap give brainliest

Answers

Answer:

its b

Step-by-step explanation:

18 times 20 = 360 and  subtract 6 = 354.

What are the coordinates of point K?
A. (3,3)
D. (10,3)
B. (3,7)
E. (10,10)
C. (7,10)

Answers

I think a cuz it logic if I’m wrong sry

Answer: The answer is A, (3,3)

Step-by-step explanation: Because it would have to have the same x value as J, and the same y value as L because of where it is placed.

please help i’ll give you and thanks and brainliest

Answers

Answer:

105

160

150

Step-by-step explanation:

This is just simple subtraction.

180-75=105

180-20=160

180-30=150

The expression 3(-2m + 5) - 6(-4m - 2) can be written in the form am + b.


What is the value of a + b? Plzz I need help

Answers

Answer:

5

Step-by-step explanation:

The computation is shown below:

Given that

3(-2m + 5) - 6(-4m - 2)

-6m + 15 + 24m + 12

18m + 27

Divided by 9

2m + 3

Here a = 2

And, b = 3

So, a + b = 2 + 3 = 5

Suzanne finances $315,000 with a 15/4 balloon mortgage at 3.75%, How much will she pay for principal and interest over the life of the loan?

$358,189.67

$357,416.36

$355,775,49

S356,638.32

Answers

Answer:

Step-by-step explanation:

Given that :

(7x18+45) divided by 3 x 2

Answers

The answer is 114 I’m just doing this for points

Answer: 28 1/2

Step-by-step explanation: (7 x 18 + 45) / 3 x 2

7 x 18

126

126+45

171

3 x 2

6

171/6 / 3/3

57/2

28 1/2

What is the equation of the parabola?

Answers

Step-by-step explanation:

Show Solution. Start by writing the equation of the parabola in standard form. The standard form that applies to the given equation is (x−h)2=4p(y−k) ( x − h ) 2 = 4 p ( y − k ) . Thus, the axis of symmetry is parallel to the y-axis.

HELP ME ASAP


Lucy is baking a cake. The recipe requires 6 cups of flour and 8 cups of sugar. Which
ratio of cups of flour to cups of sugar can be used to make more than

Answers

B:

Step-by-step explanation

Which is not equivalent to the equation P=2L+2W

Answers

Answer:

Where are the answer choices

Step-by-step explanation:

4. One number is 16 more than another. The ratio of the smaller number to
the larger number is 3: 7. What is the value of the smaller number?

Answers

Answer:

12

Step-by-step explanation:

So if the difference between the two number is 16 and the distance between the two numbers in the ratio is 4, that means the real numbers are 4 times greater than the ratio (because 4 * 4 = 16).

This means that you can multiply both sides of the ratio by 4 to get the two numbers 3: 7 --> 3*4: 7 * 4 --> 12: 28.

This means that the smaller number is 12.

hope that makes sense!

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