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3 years ago

5.

Mathematics

1 answer:

rosijanka [135]3 years ago

4 0

Answer:

D 714

Step-by-step explanation:

210 times 3.40

is 714

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Which line has a slope of 2?

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The line that has the slope of 2 is Line C.

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3 years ago

For an increase of one hour in the time spent texting, what is the predicted decrease in the time spent exercising?

BartSMP [9]

Um that is a hard one

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3 years ago

A fastball is hit straight up over home plate. The ball's height, h (in feet), from the ground is modeled by ℎ = −16푡 ଶ+103푡+5 w

Liono4ka [1.6K]

Question:

A fastball is hit straight up over home plate. The ball's height, h (in feet), from the ground is modeled by h(t)=-16t^2+80t+5, where t is measured in seconds. Write an equation to determine how long it will take for the ball to reach the ground.

Answer:

$t = 5.0625$

Step-by-step explanation:

Given

$h(t)=-16t^2+80t+5$

Required

Find t when the ball hits the ground

This implies that h(t) = 0

So, we have:

$0=-16t^2+80t+5$

Reorder

$-16t^2+80t+5 = 0$

Using quadratic formula, we have:

$t = \frac{-b\±\sqrt{b^2 - 4ac}}{2a}$

Where

$a = -16$ $b =80$ $c = 5$

So, we have:

$t = \frac{-80\±\sqrt{80^2 - 4*-16*5}}{2*-16}$

$t = \frac{-80\±\sqrt{6400 +320}}{-32}$

$t = \frac{-80\±\sqrt{6720}}{-32}$

$t = \frac{-80\±82.0}{-32}$

This gives:

$t = \frac{-80+82.0}{-32}$ or $t = \frac{-80-82.0}{-32}$

$t = \frac{2}{-32}$ or $t = \frac{-162}{-32}$

$t = -\frac{2}{32}$ or $t = \frac{162}{32}$

But time can not be negative.

So, we have:

$t = \frac{162}{32}$

$t = 5.0625$

<em>Hence, time to hit the ground is 5.0625 seconds</em>

3 0

3 years ago

A cylinder has a height of 5 centimeters and a radius of 2.3 centimeters. What is the volume of this cylinder?

Arlecino [84]

Answer:

c 83.10

Step-by-step explanation

3.14 times 2.3 times 5

4 0

3 years ago

J... = 2y-3<br>= 2y + 4

kompoz [17]

Answer:

no solution

Step-by-step explanation:

Given

2y - 3 = 2y + 4 ( subtract 2y from both sides )

2y - 2y - 3 = 4 ( add 3 to both sides )

0 = 7 ← not possible

This indicates that the equation has no solution

6 0

3 years ago