Scientists estimate that the mass of the sun is 1.9891 x 1030 kg. How many zeros are in this number when it is written in standard notation?
A 26
B 30
C 35
D 25

What is sin 7x/4 ? i need on this urgent trig

In a probability experiment, karen flipped a coin 76 times. the coin landed on heads 32 times. what percentage of the coin flips resulted in tails? round to the nearest percent. a. 58% b. 65% c. 42% d. 60%

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.