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erik [133]
1 year ago
9

Yvette exercises 14 days out of 30 in one month. What is the ratio of the number of days she exercises to the number of days in

the month? Simplify the ratio.
Mathematics
2 answers:
Anestetic [448]1 year ago
3 0

Answer:

7 to 15, 7:15, 7/15

Step-by-step explanation:

Ratios can be written as:

a to b

a:b

a/b

We want to find the ratio of exercise days to days in the month. She exercises 14 days out of 30 days in the month. Therefore,

a= 14

b= 30

14 to 30

14:30

14/30

The ratios can be simplified. Both numbers can be evenly divided by 2.

(14/2) to (30/2)

7 to 15

(14/2) : (30/2)

7:15

(14/2) / (30/2)

7/15

Inessa [10]1 year ago
3 0

Answer:

divide both numbers by 14.. the ans is 1: 2

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3/8 divided by -0.25​
madreJ [45]

Answer:

thw answer is -3/2 and in decimal form its -1.5

Step-by-step explanation:

hoped I helped:)

5 0
2 years ago
A lightbulb has a normally distributed light output with mean 5000 end foot-candles and standard deviation of 50 end foot-candle
Blizzard [7]
To find the specification limit such that only 0.5% of the bulbs will not exceed this limit we proceed as follows;
From the z-table, a z-score of -2.57 cuts off 0.005 in the left tail; given the formula for z-score
(x-μ)/σ
we shall have:
(x-5000)/50=-2.57
solving for x we get:
x-5000=-128.5
x=-128.5+5000
x=4871.50
8 0
1 year ago
A math exercise states that the circumference of a certain circle is 23.55 inches with diameter d and pi rounded to 3.14. Larry
irinina [24]

Answer:

None of them are correct.

Diameter of the Circle is 7.5 inches

Step-by-step explanation:

Given;

Circumference of the Circle = 23.55

\pi = 3.14

Formula:

\textrm {Circumference of the Circle} = 2\pi r

Substituting the values

23.55= 2\times 3.14\times r

23.55=7.28r

\therefore r= \frac{23.55}{7.28}

\therefore r= 3.23489

Now diameter is twice the radius

diameter = 2r

\therefore diameter = 2 \times 3.23489

Diameter = 7.5 inches

4 0
1 year ago
Suppose a set of data about the spread (in hundreds of acres) of a food-borne bacteria (after t weeks) in lettuce has the follow
Alexxandr [17]

Answer:

A sinusoidal model would be used

The kind of function that have consistency in the periodic rate of change is the Average rate of changes

Step-by-step explanation:

The type of model that would be used is sinusoidal model and this is because there is periodic change in the values given ( i.e the rate of changes given )

For percentage rate of changes :

starting from 0.9% there is an increase to 1.3% then a decrease to 1.1% and a further decrease to 1% before an increase to 1.3% and another decrease to 1%

For Average rate of changes:

starting from 2.9 there is a decrease to 2.4, then an increase to 3.7 and another decrease to 3.1 followed by an increase to 3.6 and a decrease back to 3.2

This relation ( sinusoidal model ) is best suited for a linear model because there is a periodic rate of change in the functions

The kind of function that have consistency in the period rate of change is the Average rate of changes

6 0
2 years ago
One of the assumptions underlying the theory of control charting is that successive plotted points are independent of one anothe
aksik [14]

Answer:

P(at least 1 wrong in 10) =0.5160

Step-by-step explanation:

Let A be the event  that there is a problem in the proces. Then the probability of problem with the process is P ( A) = 0.07

Let B be the event  that the process is without the problem. Then the probability of without problem is P ( B) = 0.93

Now we want to find the 10 successive points of event B. Since the events are independent we can find this as

P(B)+P(B)+P(B)+P(B)+P(B)+P(B)+P(B)+P(B)+P(B)+P(B)

or

P(B)^ 10= .93^10=0.48398

As we have to calculate at least 1 in 10 then we will subtract it from 1.

P(at least 1 wrong in 10) = = 1 - .93^10 =1- 0.48398=0.5160

4 0
1 year ago
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