Find the indicated probability by using the special addition rule. A relative frequency distribution is given below for the size of families in one U. S. city. Size Relative frequency 2 0.421 3 0.222 4 0.195 5 0.110 6 0.032 7 0.020 A family is selected at random. Find the probability that the size of the family is less than 5. Round approximations to three decimal places.

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6

Write an expression that is equivalent to ( 3+14)+27.