If the half-life of a substance is 2 days, what is the amount of substance left at the end of 4 days?

How do you average percentages?

788 students at elementary school each child is giving one color T-shirt The teachers are red green yellow and blue there is an equal number of each color T-shirt how many students received a red T-shirt

What's the part of speech of mince

Scarlet has a box with 16 black pens and 8 red pens. The probability that a pen randomly picked from the box is a red pen is___ Scarlet uses a six-sided die to find the probability that each color of pen is picked.

What is the area of the triangle if the base is 5 centimeters and the height is 6 centimeters? A. 15 cm2 B. 12 feet C. 4 m3 D. 16 inches

A red car is traveling at 55 mph. A blue car is traveling at 65 mph. The cars are 305 miles apart. The cars started at the same spot at different times. The total driving time for the two cars is 5 hours.

Which of the graph of f (x) = x-1/x^2-x-6

Y is equal to one less than the square of x

Ken is thinking of a number. nine more than the product of 4 and the number r is 73. find Ken's number

Consider the functions f (x) = 2x + 1 and g (x) = x2 - 10. What is the value of f[g (3) ]? 39 -3 -7 -1