Suppose that a computer has three types of floating point operations: add, multiply, and divide. By performing optimizations to the design, we can improve the floating point multiply performance by a factor of 10 (i. e., floating point multiply runs 10 times faster on this new machine). Similarly, we can improve the performance of floating point divide by a factor of 15 (i. e., floating point divide runs 15 times faster on this new machine). If an application consists of 50% floating point add instructions, 30% floating point multiply instructions, and 20% floating point divide instructions, what is the speedup achieved by the new machine for this application compared to the old machine

1.84

Explanation:

Operation on old system

Add operation = 50% = 0.5

Multiply = 30% = 0.3

Divide = 20% = 0.2

T = total execution time

For add = 0.5T

For multiplication = 0.3T

For division = 0.2T

0.5T + 0.3T + 0.2T = T

For new computer

Add operation is unchanged = 0.5T

Multiply is 10 times faster = 0.3T/10 = 0.03T

Divide is 15 times faster = 0.2T/15= 0.0133T

Total time = 0.5T + 0.03T + 0.0133T

= 0.54333T

Speed up = Old time/ new time

= T/0.54333T

= 1/0.54333

= 1.84

given the options, i would say your best bet is c. the modem supports up to 56 kbps, which is too low for video streaming. dial up modems use actual phone lines, which only can go up to 56 kbps as that's more than sufficient for traditional phone calls. this is also the reason why when a dial-up modem connects, you hear all those sounds. it's literally using the phone line to establish a connection.

what is your question exactly? when you let me know i will gladly you. : )