True or false? when calculating a confidence interval for one sample with a continuous outcome and the sample contains 30 or fewer individuals, then a t-score should be used in place of a z-score.

What is the circumference of a circle when the radius is 9?

What's 0 divided by 0?

Y = 4x + 11 y = - 2x - 1

2. A parking lot holds 40 cars. There are 20 cars in the lot already. Which inequality can be solved to show all the numbers of cars c that can still park in the lot? a. 20+C < 40 C. 60 b. 20+C = 40 d. 60 SC

Y=1/2x+13 Equation of a parallel line? Equation of a perpendicular line? Explain how you know if two lines are parallel or perpendicular based on their equations

a lab technician must screen 175 slides under the microscope each week. if she works 7 hours a day, 5 days a week, how many slides, on average, must she screen in one hour?

Lizzy has 30 coins that total $4.80. All of her coins are dimes, D, and quarters, Q. Which system of equations models this situation? 1) D+Q=4.80 .10D +.25Q = 30 2) D+Q=30 .10D +.25Q = 4.80 3) D+Q=30 .25D +.10Q = 4.80 4) D+Q = 4.80 .25D +. 10Q = 30

What is the answer to 23*-5

79.83 - 24.92 - 54.91

Mr. Williams owns a stable in the countryside. He created the expression below to represent the number of horses at the stable t years after he began boarding horses. Which statement below best describes the coefficient, 30? A.