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4 years ago

The area of circle h is 200.96 square feet. what are the radius and diameter of circle h? what is the circumference of circle h?

Mathematics

1 answer:

Vlad [161]4 years ago

7 0

Radius is 8

diameter is 16

curcumference is 50.24

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3 years ago

How many seconds of film is in 120 minutes of video?

Ronch [10]

Answer:

120*60= 7200 seconds

Step-by-step explanation:

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3 years ago

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Solve using the quadratic formula. v2 + 11v + 18 = 0

Rzqust [24]

Answer:

Answer is given below with explanations

Step-by-step explanation:

${v}^{2} + 11v + 18 = 0 \\by factorization we get (v + 9)(v + 2) = 0 \\ v = - 9 \: \: or \: \: v = - 2$

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3 years ago

Calculate the slope of a line that passes through the points (3, -20) and (5, 8).

shtirl [24]

Answer:

Step-by-step explanation:

Use rise over run, (y2 - y1) / (x2 - x1)

Plug in the points:

(y2 - y1) / (x2 - x1)

(8 + 20) / (5 - 3)

28 / 2

= 14

So, the slope is 14.

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3 years ago

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The height of a small rock falling from the top of a 124-ft-tall building with an initial downward velocity of -30 ft/sec is mod

lozanna [386]

Answer:

For the time interval 0 to 2 the ball is in the air.

Select the options according to this.

Step-by-step explanation:

The equation should be $h(t)=-16t^{2} -30t+124$

Let's find the x intercepts to answer this question.

To find x intercept where the h(t) is 0.

$-16t^{2} -30t+124=0$

Solve the equation for t.

Use quadratic formula to solve the equation.

a=-16

b=-30

c=124

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

Plug in the values of a, b and c into the formula

$x=\frac{30+/-\sqrt{(-30)^{2}-4(-16)(124) } }{2(-16)}$

Simplify it

$x=\frac{30+/- \sqrt{900+7936} }{-32}$

$x=\frac{30+/-\sqrt{8836} }{-32}$

$x=\frac{30+/-94}{-32}$

Simplify it to get two values for x

$x=\frac{30+94}{-32} =-3.875\\\\x=\frac{30-94}{-32} =2$

x can not be negative, here x represents time t.

So, it starts from 0 and remains in the air for 2 seconds.

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3 years ago