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spayn [35]
2 years ago
6

A student uses four different tape measures to estimate the length of a meter-stick manufactured to be exactly 1 meter. Which me

asurement is most accurate?
A. 99 cm
B. 105.98 cm
C. 90 cm
D. 104.5 cm
Mathematics
1 answer:
Shkiper50 [21]2 years ago
7 0
A. 99 cm      because 1 meter =100 cm
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Write the slope-intercept form of the line eith a slope of 2 and a y-intercept of -4
butalik [34]

Answer:

y=2x-4

Step-by-step explanation:

slope=2=k

y-intercept in - 4 then n=-4

y=kx+n

y=2x-4

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2 years ago
. Keith plans on eating 1 cup of tuna per day for five days. How much tuna does he need? Are 4 cans enough?
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I need help with this word problem it’s urgent please help.
harkovskaia [24]

Starting with some solution of volume <em>v</em> and an alcohol concentration of 100<em>c </em>% , if you add 180 mL of 45% isopropyl to it, you get a mixture with a total volume of 180 mL + <em>v</em>.

Each mL of the starting solution contains <em>c</em> mL of alcohol. For example, if the concentration of the starting solution is 80% (so <em>c</em> = 0.8), then each mL contains 80% = 0.8 of one mL of alcohol.

Similarly, each mL of the added solution with 45% concentration contains 0.45 mL of alcohol.

You want the new solution to have a concentration of 70%, so that the ratio of the amount of alcohol in it to the total volume is 70%, meaning

<em>cv</em> + 0.45 (180 mL) = 0.7 (180 mL + <em>v</em>)

and you want to solve for <em>v</em> :

<em>cv</em> + 81 mL = 126 mL + 0.7<em>v</em>

<em>cv</em> - 0.7<em>v</em> = 126 mL - 81 mL

(<em>c</em> - 0.7) <em>v</em> = 45 mL

<em>v</em> = (45 mL) / (<em>c</em> - 0.7)

Judging by context clues, <em>c</em> lies somewhere between 0.7 and 1. (It can't be less than 0.7 because mixing this solution with any other solution of smaller concentration will never yield a solution of higher concentration.)

If, for example, <em>c</em> = 0.8, so that your starting solution is at 80% concentration, then you would need

<em>v</em> = (45 mL) / (0.8 - 0.7) = 450 mL

to be mixed with 180 mL of 45% solution to end up with 180 mL + 450 mL = 630 mL of 70% solution.

As another example, if you're mixing pure alcohol, so that <em>c</em> = 1, you would need

<em>v</em> = (45 mL) / (1 - 0.7) = 150 mL

to make a 180 mL + 150 mL = 330 mL batch of 70% solution. The fact that you would need less of a higher concentration solution is not surprising.

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2 years ago
Which of the following is an appropriate measure of central tendency to apply
Serhud [2]

Answer:

Mean and Median

Step-by-step explanation:

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Please give me a step by step process of how to solve this...<br><br><br>Identify m∠CFB.
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Check the picture below.

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3 years ago
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