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Rufina [12.5K]
3 years ago
12

Kyle exercised hours on Wednesday, hours on Thursday, and hours Friday. How many hours did Kyle exercise in the three days? A. 1

1 1/26 B. 8 11/16 C. 8 3/26 D. 4 3/16
Mathematics
2 answers:
dezoksy [38]3 years ago
5 0
It’s B: 8 11/16 that’s how many hours Kyle exercised
olganol [36]3 years ago
3 0
I am pretty sure that the correct answer is 
B. 8 11/16 hr
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A tire company has developed a new type of steel-belted radial tire. Extensive testing indicates the population of mileages obta
Andru [333]

Answer:

Step-by-step explanation:

According to the given question, a tire company has developed a new type of steel-belted radial tire. Extensive testing indicates the population of mileages obtained by all tires of this new type is normally distributed with a mean of 37,000 miles and a standard deviation of 3,887 miles.

Let us define X be the random variable shows that the mileages tires normally distributed with

mean

μ = 37000

standard deviation

σ =3, 887

Therefore

X ~ (μ = 37000, σ =3,887)

The company wishes to offer a guarantee providing a discount on a new set of tires if the original tires purchased do not exceed the mileage stated in the guarantee. Therefore the  guaranteed mileage be if the tire company desires that no more than 2 percent of the tires will fail to meet the guaranteed mileage is determined as:

P(X < k) = 0.02

\Rightarrow P\left ( \frac{X-\mu }{\sigma }\leq \frac{k-\mu }{\sigma } \right )=0.02&#10;\\\\P\left ( Z \leq \frac{k-37,000 }{3,887 } \right )=0.02

From the standard normal curve 2% area is determined as -2.0537 and hence

\frac{k-37,000}{3,887}=-2.0537\\\\k=37000-7982.7319\\\\k=29017.2681\\\\\Rightarrow k=29018

If we consider z value at two decimal places then

\frac{k-37,000}{3,887} =-2.05\\\\\Rightarrow k=29032&#10;

Therefore the  guaranteed 29032 mileage be if the tire company desires that no more than 2 percent of the tires will fail to meet the guaranteed mileage.

The area under the standard normal curve is determined as:

6 0
4 years ago
Identify the number as a regional or irrational.explain. 291.87
Ugo [173]

Answer:

291.87 is a rational number.

Step-by-step explanation:

Rational numbers are those numbers that can be expressed in fractions that is can be written as \frac{p}{q} where p and q are integers and q\neq 0.

Consider the given number 291.87

Rewrite the decimal number as a fraction with 1 in the denominator, we get,

291.87=\frac{291.87}{1}

Multiply to remove 2 decimal places. Here, you multiply top and bottom by 10² = 100

\frac{291.87}{1}=\frac{29187}{100}

Thus, the above fraction can be written as,

\frac{29187}{100}=291\frac{87}{100}

Thus, 291.87 is a rational number.


6 0
3 years ago
Segment AB = 4x - 10
White raven [17]
(4x - 10) + (12x + 6) = 68
16x - 4 = 68
16 x = 72
x = 4.5

So, 12 (4.5) + 6 = 60
5 0
4 years ago
Read 2 more answers
The junior varsity football team score 23 points in last Saturday's game they score the combination of seven point touchdowns in
frutty [35]

Answer:

  2 touchdowns, 3 field goals

Step-by-step explanation:

The number of touchdowns cannot be more than 3, so it is relatively easy to find the solution by trial and error.

  23 is not divisible by 3, so 0 touchdowns is not a solution

  23 -7 = 16 is not divisible by 3, so 1 touchdown is not a solution

  23 -14 = 9 is divisible by 3, so 2 touchdowns and 3 field goals is a solution

  21 -21 = 2 is not divisible by 3, so there is only one solution.

7 0
3 years ago
Crystal has 6 blouses, 4 hats, 4 pairs of shoes and 9 skirts.
vagabundo [1.1K]

Answer:

Crystal have 4 distinct outfits.

3 0
3 years ago
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