What force is required so that a particle of mass has the following position function?.
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Find 
by using the Chain Rule. Express your final answer in terms of t.w =x2 + xy + y2, x = e3t, y = t
A. 3e6t + (3t + 1)e3t + 2t B. 6e6t + (3t + 1)e3t + 2t C. 3e6t + (3t + 1)e3t + 6t D. 6e6t - 3te3t + 2t
The temperature in degrees Fahrenheit can be estimated from the number of cricket chirps per minute. If a cricket chirps 40 times per minute, the temperature is approximately 50 degrees Fahrenheit. The average rate of change in temperature is 0.25 degree per chirp per minute. Use these facts to estimate the temperature when a cricket chirps 53 times per minute. ?
A. 53.25 degrees B. 57 degrees C. 40.25 degrees D. none of the above
Change to the measure indicated.962 centimeters to meters
A. 9.62 m B. 9,620 m C. 96,200 m D. 96.2 m
A tamoxifen study claims that a combination of chemotherapy and the hormone therapy tamoxifen is more effective than tamoxifen alone in preventing breast cancer. In the study, a group of researchers from the U.S. and Canada studied 1477 postmenopausal women with early-stage breast cancer. The women were randomly assigned to one of three study groups. Group A (361 patients) received tamoxifen alone on a daily basis for five years. Group B (566 patients) received chemotherapy and tamoxifen for six months, and then completed five years of tamoxifen treatment. Group C (550 patients) received chemotherapy alone for six months followed by five years of tamoxifen treatment. All 1477 patients knew which treatment they were receiving.This study can best be described as a
A. survey using stratified sampling. B. randomized controlled experiment. C. census. D. survey using quota sampling. E. survey using simple random sampling.