How would 39,9000,000,000,000km be written in scientific notation

Emily has $60. Out of the $60, she spends 50% on groceries. This grid represents $60. How many would I need to shade of the squares to represent the amount of money Emily spent on groceries.

LMose Inele PII D question numbers 1 to 10. 1. Given that HCF (156, 78) = 78, LCM (156, 78) is (A) 156 (B) 78 (C) 156 x 78 (D) 156 x 2 a: nimila mm.

Describe the process of subtracting a negative integer from a positive integer

What percent of $150 is $87

Frieda is 67 inches tall and weighs 135 pounds. women her age have a mean height of 65 inches with a standard deviation of 2.5 inches and a mean weight of 125 pounds with a standard deviation of 10 pounds.

Find the output, y, when the input, x, is 30. y = 14 - 0.5x

Let's say that you want to paint a room in your house. The room has rectangular walls. Each wall is 8 feet high. Two of the walls are 15 feet long, and the other two walls are 12 feet long.

Thirty students volunteered to set up booths for the school fair. All of the students worked 2 hours after school on Thursday and on Friday. Twelve of them also worked 3 hours on Wednesday.

What is the slope of the equation y = 3/4x + 8? A. 3/4 B. 8 C. 3 D. 4

Seth learned to play a total of 8 pieces over the course of 4 weeks of piano lessons. In all how many weeks of piano lessons will Seth need before he will be able to play a total of 18 pieces?