Answer:
3200
Step-by-step explanation:
area= (l*b)
area=(160*20)
area=3200
Are there multiple choices
Answer:
D :If 4x + 12 ≠ –4, then 3x + 7 ≠ −5.
Answer:
Under 99% confidence level we can say that mean speed of the new chips is greater than that of the old chips
Step-by-step explanation:
: Mean speed of the new chip is the same as the old chip
: Mean speed of the new chip is greater than the old chip
to calculate the z-statistic we can use the formula:
z=
if we put the numbers then
z=
=4.8171
The probability of this z-statistic is < 0.001 Therefore Under 99% confidence level we can say that mean speed of the new chips is greater than that of the old chips