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sveta [45]
3 years ago
9

My question on math. please help me.

Mathematics
1 answer:
FromTheMoon [43]3 years ago
7 0

Answer:

89.6 m/min and 5.376 km/hr

Step-by-step explanation:

The first step in any word problem with variables is to fill in the variables that you know. We are given p, 0.8 meters. We can plug 0.8 into the given equation to solve for n.

\frac{n}{p}=140\\\frac{n}{0.8}=140\\0.8*\frac{n}{0.8}=140*0.8\\n=112

We now know two things: Bernard's step length is 0.8 meters and he takes 112 steps per minute. Multiply those two numbers together to find how many meters Bernard will cover in those 112 steps, and there are your meters per minute.

0.8*112=89.6

Bernard travels at a speed of 89.6 meters per minute.

Next, we need to convert to kilometers per hour. The conversion for meters to kilometers is to divide by 1000, and if we do that, we come up with a speed of 0.0896 <u>kilometers</u> per minute. Since there are 60 minutes in an hour, we can multiply by 60 to get the distance over an hour:

0.0896*60=5.376

Bernard travels at a speed of 5.376 kilometers per hour.

I hope this helps!

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Step-by-step explanation:

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2 years ago
Pea flowers may be purple (P) or white (p). Pea seeds may be round (R) or wrinkled (r). What proportion of the offspring from th
Rudiy27

Answer:

The proportion of the offspring from the cross PpRr × PpRr that are expected to have white flowers and wrinkled seeds is 1/16 or 6.25%.

Step-by-step explanation:

The uppercase letter represents the dominant allele, while the lowercase represents the recessive allele. The dominant allele determines the phenotype (observable trait) when it is present. 

When you cross heterozygous individuals for each trait, each individual of the offspring has the probability of 1/6 of each combination of four alleles (two for each trait). Because the dominant allele determines the phenotype when it is present, the probability of dominant phenotypes is higher than recessive phenotypes.

Proportions of each phenotype in the offspring from the cross PpRr × PpRr are:

Purple flowers with round seeds: 9/16

Purple flowers with wrinkled seeds: 3/16 

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White flowers with wrinkled seeds: 1/16

The proportion of individuals with white flowers and wrinkled seeds is the lowest because they are homozygous recessive for both traits. 

8 0
3 years ago
Trying to find volume of a right circular cone.
viva [34]

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<u>Step-by-step explanation:</u>

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From the above formula, we can find the radius as, 5 ft.

Volume of the cone = π r² h/3

s = √ (5²+ h²)

Squaring on both sides, we will get,

s² = 15² = (5² + h²)

 15² - 5² = h²

225 - 25 = 200 = h²

h = √200 = 14.1 ft

Volume = π × 5² × 14.1  / 3 = 117.5 π ft³

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