Whats the answer to this - 4e-9=19

Alyssa has saved 77$ from mowing lawns. she spends 34 on back to school. how much dose she save.

8 tenths and 7 hunderths can be regrouped as what?

What is 6 divided by 0.5

Pretend you own a company that sells items over the Internet. You decide that shipping costs will be based on the total weight of a customer's purchase. Write a piecewise function for your shipping charges.

A letter is selected from the words in accommodation list all the possible outcomes

Solve the system of equations. y = x + 6 y = x^2 + 8x + 16

Tiffany is packing her bags for her vacation. She has 8unique toy animals, but only 4fit in her bag. How many different groups of 4 toy animals can she take?

Find the prime factorization of 50 using exponents

Georgetown Theater issued 5,200 tickets last weekend. This weekend, the theater issued 74% fewer tickets. How many tickets to comedies did the theater issue this weekend? 1,343 tickets 1,352 tickets 1,342 tickets 1,354 tickets

A person in a balloon which is 2,000 feet above the airport finds that the angle of depression to a ship out at sea is 21°. Find the horizontal distance between the balloon and the ship.