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2 years ago

PLEASE HELP ME I WILL MARK CORRECT ANSWER BRAINLIEST

Mathematics

1 answer:

Assoli18 [71]2 years ago

6 0

Answer:

36 units

Step-by-step explanation:

to do this you must first find the lengths of all the sides with pythagorean theorem

for a to b you use

3^2 + 4^2 = c^2

9 + 16 = c^2

25 = c^2

c = 5

5 is one of the lengths

b to c uses the same equation

5 is another one of the lengths

for d to c your equation is

5^2 + 12^2 = c^2

25 + 144 = c^2

169 = c^2

13 is another of the lengths

d to a has the same length as c to d so there is another 13 unit length

5 + 5 + 13 + 13 is your equation to find the perimeter

5 + 5 + 13 + 13 = 36

that is your answer

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3 years ago

Read 2 more answers

Once his parachute is open, a skydiver descends at a rate of 25 feet per second. 90 seconds after the parachute opens, his altit

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Using the information given and linear function concepts, it is found that:

a) The equation is: $y(t) = -25t + 5000$ .

b) The skydiver’s altitude after the parachute has been open for 2 minutes is of 2000 feet.

c) It takes 200 seconds for the skydiver to reach the ground.

<h3>What is a linear function?</h3>

A linear function is modeled by:

$y(t) = mt + b$

In which:

m is the slope, which is the rate of change, that is, by how much y changes when t changes by 1.

b is the y-intercept, which is the value of y when x = 0.

Item a:

The skydiver descends at a rate of 25 feet per second, hence $m = -25$ .

Then:

$y(t) = -25t + b$

<u>90 seconds after the parachute opens, his altitude is 2750 feet</u>, which means that when $t = 90, y = 2750$ , which is used to find b. Then:

$2750 = -25(90) + b$

$b = 5000$

Hence, the equation is:

$y(t) = -25t + 5000$ .

Item b:

Time is in seconds, hence, this is y(120).

$y(120) = -25(120) + 5000 = 2000$

The skydiver’s altitude after the parachute has been open for 2 minutes is of 2000 feet.

Item c:

The time it takes to reach the ground is t for which y(t) = 0, hence:

$-25t + 5000 = 0$

$25t = 5000$

$t = \frac{5000}{25}$

$t = 200$

It takes 200 seconds for the skydiver to reach the ground.

You can learn more about linear functions at brainly.com/question/26065573

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