11. A lab technician took 500 milliliters of blood from a patient. The technician used \( \frac{1}{6} \) blood for further tests. How many milliliters of blood were used for further tests? (Round your answer to the nearest hundredth.)

A car was valued at \( \$ 45,000 \) in the year 1993 . The value depreciated \( \$ 12,000 \) by the year 2003 . A) What was the annual rate of change between 1993 and 2003 ?

Valuate \( \sum_{k=1}^{8}(-1)^{k+1} 3 k \)

During the month of January, "ABC Appliances" sold 51 microwaves, 22 refrigerators and 34 stoves, while "XYZ Appliances" sold 36 microwaves, 27 refrigerators and 24 stoves, During the month of February, "ABC Appliances" sold 47 microwaves, 31 refrigerators and 25 stoves, while "XYZ Appliances" sold 50 microwaves, 34 refrigerators and 18 stoves, a. Write a matrix summarizing the sales for the month of January, (Enter in the same order that the information was given.) b. Write a matrix summarizing the sales for the month of February, (Enter in the same order that the information was given.)

A clock chimes every 20 minutes. A light flashes every 8 minutes. The clock chimes and the light flashes together at 08:00. How many times between 08:01 and 12:30 will the clock chime and the light flash together? Show your working.

19. Find all the possible values of the missing digit(s) represented by \( (*) \) a) \( 2 * 6,8 * 71,8 * 919 \) are divisible by 11 .