An instructor has graded 20 exam papers submitted by students in a class of 21 students, and the average so far is 68. (The maximum possible score is 100.) How high would the score on the last paper have to be to raise the class average by 2 point?

at the beginning of an observationally study a culture contains 6000 bacteria. after 3 hours 9500 bateria if the bacteria grew exponecially. janice claims there will be 200000 after 20 hours is she correct

A survey shows that 3 out of 4 of those drink coffee in a town with a population is 7900 adults how many of these adults would you expect to drink coffee?

Suppose that weights of males in my family are N(250,24) where 250 and 24 are in pounds. I weigh 230 pounds. The percentage of males in my family that weigh more than me and less than my brother is 35%. How much does my brother weigh?

Meredith works at a blood bank. She needs to write a report of the ratio of type- a blood donated to tpye-o blood donated, but she lost this month's logs that had the quantities. She knows that last month 25 pints of tpye-a blood were donated and 42 pints of tpye-o blood were donated. She remebers that this month 55 pints of tpye-a blood were donated. if the ratio held true for this month, how can Meredith determine the amount of tpye-o blood donated

4. Ravi is putting up a fence in his backyard. He builds 3 units the first day, 7 units the second day, and 11 units the third day. If he continues this pattern, how many days will it take him to finish the 55 unit fence? Complete the table of values to solve the problem.