Tammy has begun an exercise program. she worked out five days the first week for 28 minutes, 32 minutes, 21 minutes, 38 minutes and 42 minutes. round each amount to the nearest 10 to find an estimate of the total number of minutes tammy exercised during the week.
a. 110 min.
b. 140 min.
c. 160 min.
d. 190 min.

What is 1/3x5 on anuber line what does it look like on a number line

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables