A, B and C lie on a straight line segment, A, E and D lie on a straight line segment.
BE = 3.2m, CD = 8m and BC = 0.5m.
Work out the length of AB.
Write your answer to two decimal places.

The diagram is not drawn to scale.

Which of the following is true for the relation f(x)=2x^2+1

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of