Answer:
68% of the data is between 5.7 and 7.7 grams.
Step-by-step explanation:
According to the empirical rule for a normal distribution, 68% of data falls within one standard deviation, 95% of data falls within two standard deviation and 99.7% of data falls within three standard deviation.
Given that:
mean (μ) = 6.7 grams, standard deviation (σ) = 1 gram.
From the empirical rule:
68% of the data is between one standard deviation i.e μ ± σ = 6.7 ± 1 = 5.7, 7.7
Therefore 68% of the data is between 5.7 and 7.7 grams.
Answer:
22
Step-by-step explanation:
(4a+6b)×(a-b)
=4a(a-b)+6b(a-b)
=4a^2-4ab+6ab-6b^2
=4a^2+2ab-6b^2
Answer:
False
Step-by-step explanation:
The left side 2 does not equal to the right side 18
, which means that the given statement is false.
First do the exponents. 20*20=400. 3y is not the same type of number as the rest of them, so move on. (It might help to rearrange the equation: 400-2+3y.)
Subtract 2 from 400. This is 398. The answer is 398+3y.