Assume that a sample is used to estimate a population mean. find the 80% confidence interval for a sample of size 755 with a mean of 51.4 and a standard deviation of 8.7.

Pick the expression that matches this description: a polynomial of the 5th degree with a leading coefficient of 7 and a constant term of 6 (choice a) 7x^5+2x^2+6 (choice b) 7x^6−6x^4+5 (choice c) 6x^7−x^5+5 (choice d) 6x^5+x^4+7

Askyscraper is 396 meters tall. at a certain time of day, it casts a shadow that is 332 meters long.at what angle is the sun above the horizon at that time?

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi