There are a total of 122 countries in Africa, Europe, and North America (as of 2003). Europe has twice as many countries as North America, and Africa has seven more than Europe. How many countries are in each of these three countries?

Ten raised to a negative exponent is a number less than 0, true or false?

Add 6 and 8. Then, multiply by 2. Which of the following expressions matches the statement above? A. 8 + 6 * 2 B. 6 + 8 * 2 C. 2 * (6 + 8) D. 6 * (2 + 8)

11. Sylvia Norton's account Beginning balance: $862.91 Deposits: $794.26 Interest: $6.08 Withdrawals: Ending balance: $1,310.69

Lisa and Bart spin this spinner 60 times the result are below / black=17 blue=15 orange=21 purple=7 a. What is the experimental probability of a spin of orange? B which color had an experimental probability that matched its theoretical probability

A graphics company charges $50 per hour to create a logo plus $250 for the ownership rights of the logo. A private contractor charges $75 per hour to develop a logo plus a $100 supply fee.

Zack says that the probability of rolling a number less than 4 on a six-sided number cube is 4/6. Valeria says that the probability is 3/6. Who is correct? Explain.

The unit price of hot dogs is $0.50/hot dog. How much will 12 hot dogs cost?

The formula to convert °F to °C is C = 5/9 (F - 32). 50°C = 122 °F Why do you multiply 50 by the reciprocal of 5/9

Yan is climbing down a ladder. Each time he descends four rings on the ladder, he stops to see how much farther he has to go. Which word in the problem indicates that a negative integer should be used 1 : Climbing 2: Stops 3: Descends 4: Farther

If a hat that costs $30 is discounted by 15%, what's the sale price?