Find the exact value of the expression without using calculator sin38 - cos52

Test scores on a statewide standardized test for a large population of students are normally distributed with mean = 9.44 and standard deviation = 1.75. Certificates are given to students who score in the top 2.5% of those who took the test.

James, Priya, and Siobhan work in a grocery store. James makes $7.00 per hour. Priya makes 20% more than james, and Siobhan makes 5% less then priya. How much does Siobhan make per hour?

Simplify the expression (8^12) ^3

The product of 2 and the difference of 5x and 6 is less than or equal to the sum of x and 24?

For sample mean x = 150, sample size n = 36 and sample standard deviation s = 40 find 80% confidence interval for population mean. population standard deviation is not known. use formula for one mean t-interval procedure in section 8.

Dish detergent is sold in three different sizes. To save money you want to buy the size that gives you the best deal. Determine which of the sizes has the best unit cost.

Which fraction is greatest 5/6 7/9 2/3 or 9/12

The length of a rectangle is 4 times the width. The perimeter is 90 cm. Find the width and length.

Suppose that today (year 0) your car is worth $17,000. Each year your car loses 10% of its value, but at the end of each year you add customizations to your car which increase its value by $20. Write a recurrence relation to model this situation.

Jenny saved 1/6 of her paycheck and saves 2/5 of the remaining amount. What fraction of her total paycheck is saved?