Ind the volume of a pyramid with a square base, where the side length of the base is 15.3\text{ m}15.3 m and the height of the pyramid is 19.6\text{ m}19.6 m. Round your answer to the nearest tenth of a cubic meter.

1,487.3m³

Step-by-step explanation:

Volume of a square based pyramid is expressed as;

V = BH/3

B is the base area

H is the height of the pyramid

Since the side length of the base is 15.3m;

Base area = L²

Base area = 15.3²

Base area = 234.09m²

Height of pyramid = 19.6m²

Get the volume

Volume of the square based pyramid = (234.09*19.6)/3

Volume of the square based pyramid =1,487.3m³ (to the nearest tenth)

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

step-by-step explanation:

the true ones are a b and d