Using the same cure it is known that a standard deviation is 130 kg/cm² and we may assume normal distribution. 100 pieces of cement have been tested and the
observed sample mean is X = 4970. Find the 95% confidence interval for the
mean.
(A) (4858.37, 5081.63)
(C) (4883.33, 5056.67)
(B) (4885.07, 5054.93)
(D) (4944.00, 4996.00)

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

How many glue sticks are in a basket containing 96 scissors, if the ratio of glue sticks to scissors is 19 to 57.