The Swiss Hiking Federation is an organization that is known for promoting the same use of the hiking trail system throughout Switzerland. Suppose SHF would like to investigate the linear relationship between the amount of time to hike Wengen-Kleine trail in the Jungfrau region and the age of the hiker. A random sample of 7 hikers on this trail was selected and their age and hiking time is below. AGE: 24 32 47 40 26 53 38
TIME: 2.7 4.2 5.0 3.8 2.2 2.9 3.0

Using XLS, calculate the correlation coefficient for this sample. Test to see if the population correlation coefficient is not equal to zero using a 90% CI.

Y=4x^2+x-1 solve using quadratic formula

What is the distance between the points 4,10 and -3,-14 on the coordinate plane

Someone answer this asap rn for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =