Answer:
8 3/4 cups of sugar
Step-by-step explanation:
1 batch of chocolate chip cookies ↔ 2 1/2 cups of sugar
3 1/2 batch of chocolate chip cookies ↔ 3 1/2 * 2 1/2 cups of sugar
3 1/2 * 2 1/2 = 7/2 * 5/2 = 35/4 = 8 3/4 = 8.75
1)
LHS:
LHS = RHS. So, the statement is true
2)
LHS:
LHS not equal to RHS. So, the statement is false
3)
LHS:
LHS = RHS. So, the statement is true.
4)
LHS:
LHS = RHS. So, the statement is true.
15 / 40 = .375
total # total #
of girls of students
.375 = 37.5%
15/40 as a fraction ---> simplify ---> 3/8
The confidence interval formula is computed by:
Xbar ± Z s/ sqrt (n)
Where:
Xbar is the mean
Z is the z value
S is the standard deviation
N is the number of samples
So our given are:
90% confidence interval with a z value of 1.645
Sample size 40, 45
Mean 180, 179
Standard deviation 2, 4
So plugging that information in the data will give us a
confidence interval:
For 1:
Xbar ± Z s/ sqrt (n)
= 180 ± 1.645 (2 / sqrt (40))
= 180 ± 1.645 (0.316227766)
= 180 ± 0.520194675
= 179.48, 180.52
For 2:
Xbar ± Z s/ sqrt (n)
= 179 ± 1.645 (4 / sqrt (45))
<span>= 179 ± 1.645 (0.596284794)</span>
therefore, the answer is letter b
