Amodel is made of a car. the car is 10 feet long and the model is 7 inches long. what is the ratio of the length of the car to the length of the
model?

a) 10: 7
b) 7: 120
c) 7: 10
d) 120: 7

Three coins are flipped. what is the probability that there will be at least two tails?

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?