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vesna_86 [32]
2 years ago
5

A submarine was at the surface of the water. 21 seconds later, it was at a depth of 294 meters. What was the average change in t

he submarines depth each second?
Mathematics
1 answer:
topjm [15]2 years ago
3 0

Step-by-step explanation:

21 seconds = -294 meters

=> 1 second = -294/21 = -14 meters

Hence the average change is -14 meters per second.

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Could anyone help me with these?
lora16 [44]
Part A:

Derrick is incorrect.
A yard is equivalent to 3 feet.
Thus, 20 yards will be equivalent to 60 feet.

The width is 20 yard and 2 feet. It's the same as 60 feet and 2 feet, or 62 feet. Thus, Derrick is incorrect.

Part B:

Let's calculate the area of the parking lot.

We know the width is 62 feet from part A.
The length is 30 yards, or 90 feet.

Multiply the length and width to get the area in square feet.

90 \times 62=5580

The parking lot has an area of 5580 square foot.
It costs 2 dollars per square foot to repave the parking lot. Multiply the area by 2 dollars.

5580 \times 2=11160

It will cost $11,160 to repave the whole parking lot.
4 0
3 years ago
Read 2 more answers
Marisol attempted to determine the slope of a line based on the two points shown in the table below.
Fynjy0 [20]

Answer:

C

Step-by-step explanation:

Hope this is right, this is what I got.

3 0
3 years ago
Read 2 more answers
Evaluate each expression if a = 5, b = 6, C = 4, and d = 3.<br><br> a. 2ab + cd<br> b. abc
PolarNik [594]

Answer:

a(2ab+cd

(2×5×6)+(4×3)

60+12

72

b)abc

5×6×4

120

8 0
2 years ago
For a recent year, the rate of first-class postage is as follows:
Law Incorporation [45]

Answer:

$0.95

Step-by-step explanation:

Given that weight of the function = x

Given that cost of the postage for mail having weight less than or equal to 1 oz = $0.44

then to find the equation can be written as

C(x)=0.44  where 0<x<=1

Similarly we can write equation for other parts

C(x)=0.61  where 1<x<=2

C(x)=0.78  where 2<x<=3

C(x)=0.95  where 3<x<=3.5

Now we can write them together as piecewise function as shown in below:

C(x)=\left\{\begin{matrix}0.44 & 0

to graph that we just draw horizontal lines for each as none equation contains x on the right side .

3.48 oz is less that 3.5 so we will use $0.95.


7 0
2 years ago
Read 2 more answers
Please help............... :)
ZanzabumX [31]

Answer:

False

Step-by-step explanation:

Let's list all the odd numbers less than 15.

13, 11, 9, 7, 5, 3, 1

Prime numbers are numbers that can only be multiplied by 1 and themselves. But, we can see, that 9 can be multiplied by 3 and 3, making it a not-prime number (sorry I don't remember the exact name for that, I'm blanking out).

The number 9 makes that statement false.

Hope I helped! ouo.

~Potato.

Copyright Potato 2019.

4 0
3 years ago
Read 2 more answers
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