Which number is in scientific notation

A. 3.4 x 100^2

B. - 5x10^-12

C. 0.84x10^6

D. 7.8x10^5

t takes Phillip 7 hours to proof a chapter of Hawkes Learning Systems' Intermediate Algebra book and it takes Kim 3 hours. How long would it take them working together? (Round your answer to two decimal places.)

Enzo wins 5 tickets from every game, and Beatriz wins 11 tickets from every game. When they stopped playing games, Enzo and Beatriz had won the same number of total tickets. What is the minimum number of games that Enzo could have played?

56/6 - 32/6 in mixed number

The sum of 14 and twice a number is 7 less than 6 times a number. What is the number?

If two fair dice, one red and one white, are rolled, in how many ways can the result be obtained? A different number on each die. O A. 25 ways OB. 30 ways O c. 6 ways D. 36 ways

A recipe requires 1/3 cup of milk for each 1/4 cup of water. How many cups of water are needed for each cup of milk

A store offers 20% off all items. If x is the original price, which expression represents the final price with the discount? select all that apply. A. 1.2x B. 0.08x C. x D. x - 0.2x E. x + 0.2x

What is 8.49*10-7 in decimal form 0.0000000849 i think this one? 0.000000849 8,490,000 849,000,000

A bank charges you $3 each time you use an out of network Atm. At the beginning of the month you have $1500 in your bank account. You withdraw $60 from your bank account each time you use an out of network ATM.

2.8% as a fraction in simplest form