What number needs to be added to 7 and 9 so that the ratio of the first number to the second becomes 4 : 5?

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

Find the solution of each of the following.

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?