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3 years ago

Im give 15 points if you know this phm

Mathematics

1 answer:

pickupchik [31]3 years ago

8 0

Answer:

The answer is option (D) 8.17 × 10^8...

Hope u like it

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What isthe answer to 3/5 ❌ 20

finlep [7]

3/5 × 20/1 = 12 because 3×20 is 60 and 5×1 is 5 so 60/5 and that simplifies to 12

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3 years ago

The principal P is borrowed at a simple interest rater for a period of time t. Find the loan's future value A, or the total amou

Andrews [41]

Simple interest formula:
I=PRT

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P(initial amount of money)
R(interest rate as a decimal)
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Therefore, the future value of A is $2,940

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3 years ago

A car salesperson earns a $500 fee per car she sells. If she sells 4 cars in one day, how much money does she earn in fees?

Bumek [7]

She will earn $2,000 fees for the 4 cars that she sold.

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3 years ago

Read 2 more answers

The height of a ball thrown into the air after t seconds have elapsed is h = −16t2 + 40t + 6 feet. What is the first time, t, wh

sp2606 [1]

<h3>The first time when the ball will reach a height of 20 feet is 0.42 seconds</h3>

Solution:

Given that,

The height of a ball thrown into the air after t seconds have elapsed is:

$h = -16t^2 + 40t + 6$

What is the first time, t, when the ball will reach a height of 20 feet?

Substitute h = 20

$20 = -16t^2 + 40t + 6\\\\-16t^2 + 40t + 6 -20 = 0\\\\-16t^2 + 40t -14 = 0\\\\16t^2 -40t + 14 = 0\\\\8t^2 -20t + 7=0$

Solve by quadractic formula

$\mathrm{For\:a\:quadratic\:equation\:of\:the\:form\:}ax^2+bx+c=0\mathrm{\:the\:solutions\:are\:}$

$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

$\mathrm{For\:}\quad a=8,\:b=-20,\:c=7$

$t = \frac{-\left(-20\right)\pm \sqrt{\left(-20\right)^2-4\cdot \:8\cdot \:7}}{2\cdot \:8}\\\\t = \frac{20 \pm \sqrt{176}}{16}\\\\t = \frac{20 \pm 4\sqrt{11}}{16}\\\\t = \frac{ 5 \pm \sqrt{11}}{4}\\\\We\ have\ two\ solutions\\\\ t=2.07915, \:t=0.42084$

Rounding off we get,

t = 2.08 , t = 0.42

Thus the first time when the ball will reach a height of 20 feet is 0.42 seconds

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3 years ago

For parts of the circle I can be given more than a name right all possible names

Dovator [93]

Answer:

Step-by-step explanation: i think that u forgot the chart sorry i can not help

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2 years ago