The diameter of a circle is 14 ft. Find its area to the nearest tenth.

615.8

Step-by-step explanation:

A=πr2=π·142≈615.75216

Solution given:.

diameter=14ft

radius [r]=14/2=7ft

Now

Area of circle =πr²=π×7²=154ft²

the function makes a strait line horizontally with no x intercept but a y intercept at 9.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15