Length of pregnancies have a mean of 267.6 days and have standard deviation of 15.1 days. A woman tracked her pregnancy and found it to be 309 days. find the Z score for 309. is such length unusual

The Jets are driving 30 miles per gallon of gas. they are traveling 7 hours at 55 miles per hour. how much gas do they need

What is 9147392 the Rounded nearest thousand

Solve equation 7 (10) ^n=700

There are 28 students in math class, 22 of the students passed a recent test. What percentage passed the test

Given the formula x, = 2a (b-+7), find x if a=3 and - b:S

Each product is in the form ax2 + bx + c. (x + 3) 2 = x2 + 6x + 9 (x + 4) 2 = x2 + 8x + 16 (x + 5) 2 = x2 + 10x + 25 (x + 6) 2 = x2 + 12x + 36 Which of the following describes the relationship between b and c? A: c is 1.5 times that of b.

Geometry express the area of a square with sides of length 5ab as a monomial

Jon wrote the expression shown. -4x+3+5x-1 Write the expression that is equivalent to Jon's using the fewest number of terms possible.

When testing μ, how do we decide whether to use the standard normal distribution or a Student's t distribution? If the x distribution is normal and n ≥ 30 with known σ we use the Student's t.

What is - 90>-5 (k-3) ?