Select the correct answer. Jeff has created a table to calculate the cost of raw materials that he purchases monthly. Cell A2 shows the fixed cost of the raw material (3). Column D lists the
quantity (number of units) that Jeff purchased each month. What formula can Jeff use in E2 to calculate the monthly cost of the raw material that he can copy to all
the rows below?
1 Monthly rate
2
3
4
5
6
7
Month
Jan
Feb
Mar
Apr
May
Jun
D
Number of units Cost
10
8
12
13
10
15
ОА.
=A2*D2
B.
=$A2 D2
ОС.
=$A$2*$D$2
D. =$A$2*D$2
E.
=A$2*D2

When making changes to optimize part of a processor, it is often the case that speeding up one type of instruction comes at the cost of slowing down something else. for example, if we put in a complicated fast floating-point unit, that takes space, and something might have to be moved farther away from the middle to accommodate it, adding an extra cycle in delay to reach that unit. the basic amdahl's law equation does not take into account this trade-off. a. if the new fast floating-point unit speeds up floating-point operations by, on average, 2ă—, and floating-point operations take 20% of the original program's execution time, what is the overall speedup (ignoring the penalty to any other instructions)? b. now assume that speeding up the floating-point unit slowed down data cache accesses, resulting in a 1.5ă— slowdown (or 2/3 speedup). data cache accesses consume 10% of the execution time. what is the overall speedup now? c. after implementing the new floating-point operations, what percentage of execution time is spent on floating-point operations? what percentage is spent on data cache accesses?