Ms. Foster has a cass of 15 students. She can spend $20 on each student to buy math supplies for the year. She first buys all of her students calculators, which costs a total of $101.55. After buying the calculators, how much does she have left to spend on each student?​

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

Find the y-intercept and x-intercept for the equation 5x-3y=60 what is the y-intercept

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?