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r-ruslan [8.4K]
2 years ago
9

Johnathon weight 60 pounds when he was in the 4th grade. Over the last four years, he has gained 80% of his original weight. How

much does he weigh now? A. 140 pounds
B. 108 pounds
C. 120 pounds
D. 131 pounds​
Mathematics
2 answers:
Gekata [30.6K]2 years ago
7 0

Answer:

108

Step-by-step explanation:

60 plus 80% = 108

NikAS [45]2 years ago
5 0

Answer:b

Step-by-step explanation:108 60x80

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The demand for a daily newspaper at a newsstand at a busy intersection is known to be normally distributed with a mean of 150 an
AURORKA [14]

Answer:

171 newspapers.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 150, \sigma = 25

How many newspapers should the newsstand operator order to ensure that he runs short on no more than 20% of days

The number of newspapers must be on the 100-20 = 80th percentile. So this value if X when Z has a pvalue of 0.8. So X when Z = 0.84.

Z = \frac{X - \mu}{\sigma}

0.84 = \frac{X - 150}{25}

X - 150 = 0.84*25

X = 171

So 171 newspapers.

4 0
3 years ago
Victoria is going to invest in an account paying an interest rate of 1.5% compounded quarterly. How much would Victoria need to
mamaluj [8]

Answer: P = 2716.3448786 or about 2700

Step-by-step explanation:

3 0
3 years ago
What is equivalent to 31/50 in fraction form
tigry1 [53]
\frac{31}{50} = \frac{31}{50} \times \frac{2}{2} =\boxed{\bf{ \frac{62}{100} }}

62/100 is equivalent to 31/50.
6 0
3 years ago
72% of what number is 27?
Tems11 [23]
72 is 266.666666667% of 27
3 0
2 years ago
Read 2 more answers
Please help me with this
Fittoniya [83]
160•.60=96
160-96=64
the discount is 96 and the amount after the discount is 64 i think
7 0
2 years ago
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