Answer:To calculate the sales tax that is included in a company's receipts, divide the total amount received (for the items that are subject to sales tax) by "1 + ...
Step-by-step explanation:
I believe it is 2.5 if you need me to explain I can
Answer:
4.80 radians
Step-by-step explanation:
recall
180° = π radians
hence,
1° = π/180 radians
275° = (π/180) x 275 radians (assume π = 3.1416)
= (3.1416 / 180 ) x 275
= 4.7996
= 4.80 radians (2 decimal place)
It may help you to consider the standard normal curve. If the mean here is 70%, then 0.5 of the area under this curve. In other words, half the students received a grade > 70%. That would be 100 students.
Note that 84 is 2 std dev above the mean.
Recall the Empirical Rule: 95% of scores lie within 2 std. dev of the mean.
Measuring from the mean, that would be 47.5% above the mean and 47.5% below the mean. The area to the right of the mean is 0.5. Subtract 0.475 from that to obtain the fraction of students who rec'd a grade greater than 2 std dev from the mean: It's 0.025.
Then the # of students who rec'd a grade greater than 84% would be
0.025(200 students) = 5 students.
