n isosceles triangle has an angle that measures 140°. Which other angles could be in that isosceles triangle?

Mathematics

1 answer:

Sergio [31]3 years ago

7 0

The other two angles could be 20 degrees each

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John can clear a lot in 1.5 hours. His partner can do the same job in 4.5 hours. How long will it take them to clear the lot wor

Arisa [49]

Answer:

1.125 h = 1h 7.5 min = 1 h 7 min 30 sec

Step-by-step explanation:

John makes 1/1.5 work per h.

His partner makes 1/4.5 work per h.

Together they make (1/1.5 + 1/4.5) = (3/4.5 + 1/4.5) = 4/4.5 work per h.

They will work

1 : 4/4.5 = 4.5/4 = 1.125 h = 1 h + 0.125 h = 1h + 0.125h*60min/1h =

=1h 7.5 min = 1 h 7 min 30 sec

8 0

4 years ago

Your company manufactures hot water heaters. The life spans of your product are known to be normally distributed with a mean of

Oksana_A [137]

Answer:

You should claim 10.5325 years on your warranty.

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:

$\mu = 13, \sigma = 1.5$