Toshie rode her bicycle for 0.5 of an hour at the rate of r miles per hour. Then she decreased her rate by by 3 miles per hour and rode her bike for 0.25 of an hour. All together, she rode her bike 3 miles. Write an equation taht can be used to determine r. Fine r

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Which of the following circles have their centers in the third quadrant?

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