Answer:
120; 10
Step-by-step explanation:
The total weight T of the four mice is simply the sum of each individual weight, assuming the mean value as true:
Pythagorean property of standard errors assumes that:
Therefore, the standard error of the total weight is:
The total weight T of the four mice will be 120 grams, give or take 10 grams or so.
Answer:
(D)56.4
Step-by-step explanation:
According to the question, Let AB=10, AC=12 and m∠B=90°.
Thus, from ΔABC, using trigonometry, we have
Therefore, at the wire meet the ground.
Answer:
6, 15, 50
Step-by-step explanation:
common sense.
X = # of posters, y = total cost
y = 2x + 250
y = 1000
1000 = 2x + 250
1000 - 250 = 2x
750 = 2x
750/2 = x
375 = x....so 375 posters can be printed
==========================
y = total cost, x = # of miles
y = 3x + 3
y = 117
117 = 3x + 3
117 - 3 = 3x
114 = 3x
114/3 = x
38 = x.....so the car was towed 38 miles