15/16 as a fraction or 3.125 as a decimal
The expected value of the cookie pack is 250 g. From the 1000 packs sampled, the average weight was actually 255 g with a standard deviation of 2.5 g. That means, the z-score for this distribution is
z = (250 - 255)/2.5 = -2
Now, we're looking for the percentage or P-value for the packs that weigh less than 250 grams. Using the P-value table, we have
P(z < -2) = 1- P(z < z ) = 1- 0.9772 = 0.0228
Thus, the 2%<span> of the sample weighs less than 250 grams.
</span>
Answer:
a) 1320 feet
b) John
Step-by-step explanation:
a) 15/60 miles per minute = 1/4 mile per minute
1/4*5280= 1320 foot per min
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25 feet per sec---------> 60*25 feet per min = 1500 feet per min
so john is faster
Answer:
32, 28
Step-by-step explanation:
3x^2 + 5
= 3(3)^2 + 5
= 27 + 5
= 32
x + 25
= 3 + 25
= 28
