Problem Solving World

Subtract.

Then add to check your answer.

3. There are 13 grapes in a bowl.

Justin ate some of them.

Now there are only Z grapes left.

How many grapes did Justin eat?

14/100 in simplest form

Modern whales appreared 5-10 million years ago. The vertebrae off a whale discovered by paleontologists contain roughly 0.25% as much carbon-14 as they would have contained when the whale was alive. How long ago did the whale die? Use k=0.00012

3 23/66 in decimal form

Diedre drew a quadrilateral with 4 right angles and opposite sides of the same length. Name all the kind of polygon did diedre draw?

Out of 300 convicted felons at a certain prison facility, 120 are incarcerated for a drug-related offense. if 5 prisoners are selected at random, what is the exact probability that 3 of them are drug-related offenders

The heights of a random sample of 50 college students showed a sample mean of 174.5 centimeters and a sample standard deviation of 6.9 centimeters. Construct a 98% confidence interval for the mean height of all college students.

Javiers grandmother lives 120 miles away. It takes 1 hour to travel 40 miles by train. If Javier leaves at 7am it is reasonable to say he will arrive in his grandmother city by 9am

What is the slope and y-intercept of y=2/3x+2?

How do you write 18/40 in a decimal

A six-sided die in which each side is equally likely to appear is repeatedly rolled until the total of all rolls exceed 400