Suppose 2kg of a radioactive substance decays to 250g in 75years. what is the half-life of the substance?

Make p the subject in m=pq+rq (2)

What is x2-4x=2x+24 equal to 0

The vertex form of the equation of a parabola is y = (x+3) ^2+53. what is the standard form?

What of following is the inverse of y=6

100 frogs are released into a parkland lake. 80 % are expected to be green and the rest yellow. What is the number of yellow frogs that would be expected?

Three of the angles of a quadrilateral are 148 degrees 104 degrees and 36 degrees what is the size of the 4th angle

Ava's car needs unexpected repairs. She needs money quickly, so she gets an easy-access loan. What is an advantage of using the easy-access loan? A. Ava will get the money she needs quickly. B. Ava will not owe money after the purchase. C.

A diver is - 50.25 meters below the surface of the water. He dives another - 10.5 meters below the surface of the water. What is the total meters the diver is below the surface of the water?

A bag contains purple marbles and yellow marbles, 86 in total. The number of purple marbles is 2 more than 5 times the number of yellow marbles. How many purple marbles are there?

What is the probability of drawing a face card that is a club on the first draw, replacing it and drawing a diamond card on the second draw? This question is based on a 52 card deck without jokers.