6. A statistics class had the following scores on Test 1: 49, 71, 77, 86, 14, 54, 30, 20, 65, 70, 66, 45, 82, 67. Find the standard deviation of this data.

7 weeks

step-by-step explanation:

convert each fraction to the least common multiple of 20, so 3/4 = 15/20 & 1/10 = 2/20, then divide 15 by 2 and you get a little over 7, so the food will last 7 weeks.

if x = 1, then the answer is 3.5

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.