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wel
3 years ago
11

Someone please help T.T I need help ASAP

Mathematics
1 answer:
const2013 [10]3 years ago
3 0

Step-by-step explanation:

Given that,

The quadratic equation that models the ball's height above the ground h, t seconds after it was thrown is given by :

h=-16t^2+108t+28 ...(1)

(a) For maximum height, put dh/dt = 0

So,

\dfrac{d(h)}{dt}=\dfrac{d}{dt}(-16t^2+108t+28)=0\\\\-32t+108=0\\\\t=\dfrac{108}{32}=3.37\ s

Put the value of t in equation (1).

So,

h=-16(3.37)^2+108(3.37)+28\\\\h=210.24\ ft

(b) When the ball reaches the ground,

h = 0

So,

-16t^2+108t+28=0\\\\t=7\ s

So, the ball hits the ground in 7 seconds.

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prisoha [69]

Answer: 0.512, 0.020, 0.012, 0.002

Step-by-step explanation:

To put these decimals in the order from greatest to least, we first need to make sure they all have the same place values.

0.012, 0.002, 0.020, 0.512

Now that they have the same place values, we can see which is bigger.

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8 0
3 years ago
Your cousin renews his apartment lease and pays a new monthly rent. His new rent is calculated by applying a discount of $50 to
nasty-shy [4]

Answer:

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Step-by-step explanation:

Let the rent be x

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<u>Final rent:</u>

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6 0
3 years ago
Because of the rainy season, the depth in a pond increases 3% each week. Before the rainy season started, the pond was 10 feet d
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It's not perfectly clear, but you seem to be saying that each week, the
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If I'm reading that correctly, then the pond is 10-ft deep when the rainy
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                     D = 10 (1.03)^x            feet.

After 8 weeks, the depth is        D = 10 (1.03)⁸  =  12.67 feet .

                         rounded to the nearest foot,  D = 13 ft.

                

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Do you have the graph?
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