Humans can hear sounds with frequencies up to 20,000 Hz, while dolphins can hear sounds as high as 150,000 Hz. Write these numbers in scientific notation.

4. For each equation, determine if = -2 is a solution. Explain or show your reasoning. a) 10 = 2 (x-9) b) 3 (x+4) = 2 (x+3) + 4

What is a factor of 67

A woman drives 169/4 miles to work each day. She stops for coffee at a shop that is 2/5 of the way to her job. How far does the woman drive before she stops for coffee?

Solve x2 + 4x - 4 = 8 for x. A) = - 12 or x = 2 B) x = - 11 or x = 1 C) x = - 2 or x = 12 D) x = - 1 or x = 11

32% as a fraction in lowest terms

Four friends bought 10 lbs of nuts and shared them equally. How many pounds if nuts did each friend get

Ten friends went to a local restaurant and all had the buffet at $6.75 each. Seven friends added ice cream for dessert for $1.99 each. Since it is a large group, a tip of $15.00 for the waitress was added. The following is the restaurant bill.

Betsy wants to paint the walls of her bedroom. Her bedroom measures 8 ft. by 10 ft. and has 8 ft. ceilings. Not counting doors and windows, how many square feet of wall will Betsy need to paint? 288 80 128 160

One winter the cost of bananas cost $0.80 per lb. The next winter the cost was $1.05 per lb. What was the percentage increase?

Which number is in the hundredths place 4982.6173