Sally is training for a marathon. She goes for a run every Tuesday and Friday Last week, on Tuesday she ran 2.4km in 18 minutes. On Friday she ran 1.8 km in 12 minutes.
a Work out the speed Sally ran each evening, in kilometres per minute.
b On which evening did Sally run faster?

Jordan has $5.37, which he is using to buy ingredients to make salsa. he is buying one red pepper for $1.29 and three pounds of tomatoes. if jordan has exactly the right amount of money he needs, what is the price per pound of the tomatoes? choose the correct equation to represent this real-world problem. solve the equation and verify the reasonableness of your answer. a pound of tomatoes costs .

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

Arandom sample of n = 25 observations is taken from a n(µ, σ ) population. a 95% confidence interval for µ was calculated to be (42.16, 57.84). the researcher feels that this interval is too wide. you want to reduce the interval to a width at most 12 units. a) for a confidence level of 95%, calculate the smallest sample size needed. b) for a sample size fixed at n = 25, calculate the largest confidence level 100(1 − α)% needed.