Rational numbers are numbers that can be written in the form
a/b where b is not equal to 0
true
Answer:
40
Step-by-step explanation:
(6 + 2i)(6 – 2i) = 36 – 4i²
= 36 + 4 = 40
Find the volumes of the two cones and subtract.
V = 1/3 * pi * r^2 * h
V = 1/3 * 3.14 * 6^2 * 9
Simplify exponent:
V = 1/3 * 3.14 * 36 * 9
Multiply:
V = 339.12
V = 1/3 * pi * r^2 * h
V = 1/3 * 3.14 * 3^2 * 6
Simplify exponent:
V = 1/3 * 3.14 * 9 * 6
Multiply:
V = 56.52
Subtract the two volumes:
339.12 - 56.52 = 282.6
So the Garden Landscaping Company purchased 282.6 ft^3 of gravel.
We can divide the pentagon into a rectangle (on the left) and a triangle (on the right)
The dimensions of the rectangle are 8x10 cm, so its area is
The triangle has the same base as the rectangle, and its height is the difference between the sides of 15 and 10: the area is
So, the total area is