There are 436 in the fifth grade at jefferson elementary. each student was challenged to read 60 books during the year. which number sentence shows how to find the number of books the students were challenged to read ?

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

We just started the introduction into circles and i have no idea how to do this.

Find the value of x. round the length to the nearest tenth