Answer: 7
2x=4
x=2
3x+1=3(2)+1=7
Answer:
4 oz
Step-by-step explanation:
2 hamsters 3 ounces each per day
6 ounces per day is drank
Monday 6 oz Tuesday 6 oz
16-12=4
Answer:
90 Confidence Interval for the proportion = [ 0.216,0.334]
Step-by-step explanation:
The confidence interval for proportion formula =
p ± z × √p(1 - p)/n
Where p = x/n
x = 42
n = number of samples = 153
p = 42/153
p = 0.2745098039 ≈ 0.275
z = z score of 90% confidence interval = 1.645
Confidence interval =
0.275 ± 1.645 × √0.275 - ( 1 - 0.275)/153
= 0.275 ± 1.645 × √0.0013031046
= 0.275 ± 0.0593820985
Confidence Interval
= 0.275 - 0.0593820985
= 0.2156179015
≈ 0.216
= 0.275 + 0.0593820985
= 0.3343820985
≈ 0.334
90 Confidence Interval for the proportion = [ 0.216,0.334]
Area of trapezoid = 1/2 (sum of parallel sides) × (perpendicular distance between them)
DС = 2 + 12 + 2 = 16 in
Area = 1/2 (16 + 12) × 9 = 14 × 9 = 126 in²
