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3 years ago

A rectangular swimming pool measures 16

Mathematics

1 answer:

romanna [79]3 years ago

3 0

Answer:

1344m

Step-by-step explanation:

16x84

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3 years ago

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For what vaule of x does 4^x =(1/8)^x-5. -15 -3 3 15

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Answer:

Step-by-step explanation:

$4^x=(1/8)^{x-5} \\\\\\(2^2)^x=(2^{-3})^{x-5} \\\\\\2^{2x}=2^{-3x+15} \\\\\\2x=-3x+15 \\\\\\5x=15 \\\\\\x=3$

Hope this helps!

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3 years ago

How would you find four points using an equation? Use this as an example... y = 40x + 30

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8 0

3 years ago

HELP

Reptile [31]

Answer:

The time it takes for the cannonball to hit the ground is 6.49 seconds.

Step-by-step explanation:

You know that the height of the cannonball above the ground, h, in meters, in time, t, in seconds, is found by the function h(t) = -4.9t² + 30.5t + 8.4. You want to calculate the time it takes for the cannonball to hit the ground, that is, the time it takes for the bullet to reach zero height. So, being h(t) = 0 you have:

0 = -4.9t² + 30.5t + 8.4

To solve a quadratic function 0=a*x² + b*x +c, the expression is applied:

$\frac{-b+-\sqrt{b^{2} -4*a*c} }{2*a}$

In this case, being a = -4.9, b =30.5 and c =8.4 you have:

$\frac{-30.5+-\sqrt{30.5^{2} -4*(-4.9)*8.4} }{2*(-4.9)}$

Solving you get:

t1= -0.26 seconds and t2=6.49 seconds

Since time does not have a negative value, then the time it takes for the cannonball to hit the ground is 6.49 seconds.

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3 years ago