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Vinil7 [7]
3 years ago
6

I haven’t done this since like sixth grade so i forgot

Mathematics
1 answer:
luda_lava [24]3 years ago
3 0

Answer:

6.5 cm

Step-by-step explanation:

25 -18.5= 6.5 ....im like 95% this is the correct answer-

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Sue wants to increase 160 by 4%
ivann1987 [24]

Answer:

a) To increase 160 by 4% we multiply by 1.04

b) To decrease 160 by 6% we multiply by 0.94

Step-by-step explanation:

a) Here we have to increase 160 by 4% we are to note that;

4 \% = \frac{4}{100} = 0.04

Therefore, increasing 160 by 4% is to add additional 0.04×160 to 160

That is 160 + 0.04×160 = 160×(1 + 0.04) = 160×1.04

Therefore Sue should have multiplied 160 by 1.04 to increase 160 by 4%.

b) Here to decrease 160 by 6%, we subtract 6% of 160 from 160 that is;

Decrease 160 by 6% = 160 - 160×0.06 = 160×(1 - 0.06) = 160 × 0.94 = 150.4

Hence to decrease 160 by 6% we multiply by 0.94.

8 0
4 years ago
A random sample of medical files is used to estimate the proportion p of all people who have blood type b.
makvit [3.9K]

Answer:

a) 106

b) 53

Step-by-step explanation:

Minimum required medical files can be found using the formula

n≥ p×(1-p) × (\frac{z}{ME} )^2 where

  • n is the minimum required medical files
  • p is the estimated proportion for blood type b
  • z is the corresponding z-score for two tailed 85% confidence level
  • ME is the margin of error in the estimation

For the case (a)

If there is no preliminary estimate for p, then it is estimated as p=0.5

corresponding z-score for two tailed 85% confidence level is 1.44

and ME is 0.07.

Putting all in the formula;

n≥ 0.5×0.5 × (\frac{1.44}{0.07} )^2  ≈ 106

For the case (b)

The only difference is p=\frac{13}{90}≈0.144

n≥ 0.144×0.856 × (\frac{1.44}{0.07} )^2  ≈ 53

7 0
4 years ago
A bookshelf is 14 inches wide there is enough space to fit 3 trophies one trophy is 2 inches wider than the other how wide is th
-BARSIC- [3]
I'm kind of confused with your question. but I know what will help you you need to subtract
8 0
3 years ago
Read 2 more answers
6.5yd and 11yd<br> please find the area
Afina-wow [57]
Multiply length times width to find the area. 6.5x11= 71.5
3 0
3 years ago
Given ΔRST congruent to ΔNPQ, m∠R = -7x + 9, m∠N = -10x, find m∠R and m∠N. <br><br> PLEASE HELP
zepelin [54]
Answer: m∠R=30° m∠N=30°

If ΔRST is congruent to ΔNPQ, then we can infer that m∠R is congruent to m∠N

m∠R=-7x+9

m∠N=-10x

If both angles are congruent, we can solve for x...

-7x+9=-10x
add 7x to both sides
9=-3x
divide both sides by -3
-3=x

Now that we know the value of x, we can solve for the measure of the angles.


m∠R=-7x+9
m∠R=-7(-3)+9
m∠R=21+9
m∠R=30°

m∠N=-10x
m∠N=-10(-3)
m∠N=30°

6 0
3 years ago
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