Answer:
6.25 kg cement, 7.5 L water
Step-by-step explanation:
2.5 kg cement / 4 kg sand = x kg cement / 10 kg sand
x = 6.25
3 L water / 4 kg sand = y L water / 10 kg sand
y = 7.5
Answer: 55
Step-by-step explanation: you break it apart into 5*5 which is 25. You break 12 in half because you need to know how much the triangle area is. You get 6*5 which is 30. 30 and 25 added will get you answer 55.
(Make sure with others.)
The answer is 92/8/11 or 1020/11
Reason: 170/55=34/11
34/11x30= 92/8/11 or 1020/11
Given:
n = 27, sample size
df = n-1 = 26, degrees of freedom
xb = 11.8, sample mean
s = 2.3, sample standard deviation.
Because population statistics are not known, we should use the Student's t-distribution.
At 99% confidence interval, the t-value = 2.779 (from tables).
The confidence interval is
11.8 +/- 2.779*(2.3/√(27)) = 11.8 +/- 1.23 = (10.57, 13.03)
Answer: (10.6, 13.0) to the nearest tenth
