8.402 x 10^-9 in standard notation

What's one plus one

The quotient of 5/9 and 1/3

Alex brought a car for $9000. The sales tax rate on the car is 3 %. How much sales tax did Alex pay

Erik buys 2.5 pounds of cashews. If each pound of cashews cost $7.50, how much will he pay for the cashews

Tom goes on holiday to South Africa. Tom wants to change £890 into South African rand. He wants to get as many 200 rand notes as possible. The exchange rate is £1 = 18.57 rand. Work out the greatest number of 200 rand notes Tom can get for £890

Why are the solutions to the proportions 40/8 = x/10 and x/40 = 10/8 the same?

What is the simplest form of 7/10 + 1/5

What is the value of x in the equation below? Round to the nearest hundredths place. A. 3.01 B. 3.17 C. 36.44 D. 38.40

Suppose that u = and v = are vectors such that | u+v |^2 = | u |^2 + | v |^2. Prove that u and v are orthogonal.

Is diameter and radius the same thing