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4 years ago

kelly subtracted 2.3 from 20 and got 17.7, explain why this answer is reasonable. need by 5:30 today 9\15\15

Mathematics

1 answer:

Orlov [11]4 years ago

8 0

The answer is reasonable because $20-2.3 = 20 -(2+0.3) = 20-2 - 0.3 = 18 - 0.3 = 17.7$

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Someone please help me with this, is very urgent

ioda

Answer:

They are congruent

Step-by-step explanation:

Because they size are same

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3 years ago

If half of a box of candy weighs 3/5 of a pound, how much would 4 full boxes weigh?

Reil [10]

So we want to know what a full box is. We have the weight of half a box. So we can use the formula: (2 x 3/5) and you want to know the outcome of four full boxes. So (2x3/5)4
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3 years ago

A farm has 75 acres of wheat. The farmer can harvest the wheat from 12 acres per day. In how many days will all of the fields be

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Solution: The field will be harvested in approximately in 7 days.

Explanation:

Let the number of days be x in which the fields will completely harvested.

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In x days he farmer can harvest 12x acres.

It is given that the farmer has 75 acres of wheat.

$12x=75$

$x=\frac{75}{12}$

$x=6.25$

In 6th day the field will not harvested completely.

Therefore, the field will be harvested in approximately in 7 days.

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3 years ago

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What is the equation of this line?

m_a_m_a [10]

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3 years ago

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4. The following intervals were plausible population proportions for a given sample. Find the margin of error in each case.

Vedmedyk [2.9K]

Answer: a. 0.15 b. 0.03 c. 0.055 d. 0.05

Step-by-step explanation:

For plausible intervals of population proportions , the margin of error is basically half of the difference between upper limit and lower limit.

a. Interval = From 0.35 to 0.65

Upper limit = 0.65

Lower limit = 0.35

Difference = Upper limit- Lower limit

= 0.65-0.35=0.30

Margin of error = (Difference)÷2 =(0.30)÷2=0.15

b. Interval = From 0.72 to 0.78

Upper limit = 0.78

Lower limit = 0.72

Difference = 0.78-0.72 = 0.06

Margin of error =(0.06)÷2=0.03

c. Interval = From 0.84 to 0.95

Upper limit = 0.95

Lower limit = 0.84

Difference =0.95-0.84= 0.11

Margin of error = (0.11)÷2 = 0.055

d.Interval = From 0.47 to 0.57

Upper limit = 0.57

Lower limit = 0.47

Difference = 0.57-0.47=0.10

Margin of error = (0.10)÷2=0.05

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3 years ago