Answer:
72
Step-by-step explanation:
8 times 9 is 72
Answer:
115°
Step-by-step explanation:
The angles of elevation and depression are supplementary, thus
angle of depression = 180° - 65° = 115°
Answer:
6300 cm^3
Step-by-step explanation:
the volume of one book = 20 × 13 × 1.5 = 900 cm^3
the volume of seven books = 900 × 7 = 6300 cm^3
So, the answer is 6300 cm^3.

1) Since in the USA 8 x 10 ^9 messages are sent every month, that means that approximately 8 billion messages are sent.
2) We can Prime factorize it:
Note that on the right side we've picked only prime numbers. In this case, 2 and 5.
So we can rewrite 8 x 10^9 as prime factors.

3) Hence, the answer is: