Which number in the set {-138, 0, 402} is a natural number?

0002077 in scientific notation

Simplify the expression. 3a-9b

A tree 11 feet high grows at the rate of 3 feet each year. How many years will it take for the tree to grow to a height of 29 feet?

Based on a study of the nations of the world, a researcher finds that wealthier nations generally have a greater percentage of the population employed in the public sector than do less fortunate nations. He claims that this relationship is causal; i.

Tina wants to save money for school. Tina invests $400 in an account that pays an interest rate of 7.5%. How many years will it take for the account to reach $8,500? Round your answer to the nearest hundredth.

Write the number in standard form 4,00+300+20+9

How do you write 81,271 in words

A sheet of plywood is 3/4 in thick. how many inches of plywood are in a stock of 9 in high

Fundraiser sold tickets at fixed price for$70. A few more were sold to cover extra expenses. After selling 10 tickets, they still had net loss of$800. Let P represent net profit when they have sold 'n' tickets.

The price Regina pays to visit the vet's clinic is calculated according to the formula 20 + 50n. Here (n) is the number of times she visits him in a year. This time it was 2. What was the cost of his visit