Lucy and Emily are racing with each other and Lucy is 90 meters in front of Emily. The distance (in meters) that Lucy
runs, for every second t, can be given by A(t)=2t and the
distance (in meters) that Emily runs, for every second t can be
given by B(t)= 5t. How many seconds will it take for Emily to
catch up with Lucy? Give your answer to the nearest whole
number.

Karen will divide her garden into equal parts. she will plant corn in 8/12 of the garden. what is the lowest number of parts she can divide her garden into?

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?

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?