Please help? I’m really confused

Mathematics

1 answer:

ivanzaharov [21]3 years ago

3 0

Answer:

48.2 in^3

Step-by-step explanation:

It'd be easier to calculate the volume if you'd change the mixed numbers to mixed numers with decimal fractions:

2 1/2 becomes 2.5

3 2/3 becomes 3.67

5 1/4 becomes 5.25

Then V = L*W*H, or

V = (5.25 in)(3.67 in)(2.5 in) = 48.2 in^3

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The rate (gallons per day) at which a pond loses water due to evaporation from one day after observation has started is give by

Andreyy89

Answer: see table below

Step-by-step explanation:

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4 0

3 years ago

Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with μ=10

Tju [1.3M]

Answer: 0.8238

Step-by-step explanation:

Given : Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with $\mu=106$ and $\sigma=15$ .

Let x denotes the scores on a certain intelligence test for children between ages 13 and 15 years.

Then, the proportion of children aged 13 to 15 years old have scores on this test above 92 will be :-

$P(x>92)=1-P(x\leq92)\\\\=1-P(\dfrac{x-\mu}{\sigma}\leq\dfrac{92-106}{15})\\\\=1-P(z\leq })\\\\=1-P(z\leq-0.93)=1-(1-P(z\leq0.93))\ \ [\because\ P(Z\leq -z)=1-P(Z\leq z)]\\\\=P(z\leq0.93)=0.8238\ \ [\text{By using z-value table.}]$