the length of pregnancy terms for a particular species of animals are nearly normally distributed about a mean pregnancy length with standard deviation of 18 days. About what percentage of births would be expected to occur within 54 days of the mean pregnancy length?

The monetary value earned for selling goods or services to customers is called a.) revenue b.) assets c.) money d.) accounting

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle