Jeff is traveling from his home in salem at a constant rate of 50 mph. he has already traveled 20 miles. his sister jennifer is making the same trip at a constant rate of 60 mph, but has only traveled 5 miles. how long will it take jennifer to catch jeff.

What is the volume of this square pyramid?

When turned about its axis of rotation, which shape could have created this three-dimensional object?

For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is