About 29% of the Earth's surface is covered by land. The total surface area of the Earth is about 510 million square kilometers. What is the area of the Earth's surface covered by land?

THe cost of a hamburger is $2.50. Each additional hamburger cost $2.00. Sully wrote this explicit rule to explain the sequence of costs: f (n) = 2 + 2.5 (n-1). Using the rule, he found the cost of 12 hamburgers to be 29.50. Is this number correct?

Solve for a. 4a+5=2+3.25a4a+5=2+3.25a

How do you write 9.7x10^4 (exponent 4) in standard form? A. 0.00097 B. 0.000097 C. 97,000 D. 970,000

Find the zeros of f (x) = x squared-x

Factoring 3xsquared + 14x + 20

How many numbers are between k and n?

Timothy tried to solve an equation step by step. 9 (2x+1/3) = 39

Find the inverse of y = 2x^2-8

What is the equation for as amembership fee, a health club charges a one-time amount of $40 and charges $25 for each month. The total fee after m months is $240. What is the value of?

By what number would you multiply - 3/8 (fraction) to get a product of 1?