A student in a Pre-Calculus class has test scores of 79, 62, 74, and 72. The final exam is worth 4 test grades.
Write a linear equation that models this problem, where x is the grade on the final exam and y is the
student's grade in the course.
What grade is needed on the final to earn a B (average score of 80%)?

∆red ≅ ∆ by rule will give brainiest if possible

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.