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Molodets [167]
3 years ago
10

Help please!!!!!!!! what is the answer

Mathematics
2 answers:
Anon25 [30]3 years ago
7 0

Answer:

About 20 inches or A

Please give Brain

and hope this helped :D

Step-by-step explanation:

icang [17]3 years ago
6 0

Answer:

A: 20

Step-by-step explanation:

There are 12 inches in a foot.

4.5 x 12 = 54,

2 x 12 = 24,

54 + 24 = 78.

As for how many inches were needed:

7 x 14 = 98,

98 - 78 = 20.

They need 20 more inches.

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Using the least number of coins how many quarters, dimes, nickels, and pennies to make $1.74
SpyIntel [72]

Let's use our largest amount (quarter) to see how many can fit evenly into 1.74.

  • 1.74/0.25 = 6.96
  • The most quarters that can fit into $1.74 is 6.

---Multiply $0.25 by 6 = $1.50

---Subtract $1.50 from $1.74 = $0.24

---We need to use the rest of the coins to fill up $0.24.

Now let's use our second largest amount (dime) to see how many can fit evenly into 0.24.

  • 0.24/0.10 = 2.4
  • The most dimes that can fit into $0.24 is 2.

---Multiply $0.10 by 2 = $0.20

---Subtract $0.20 from $0.24 = $0.04

No nickels can fit into $0.04, because they are worth $0.05.

We can use our least amount (pennies) to fill in the $0.04 remaining.

Your answer is 6 quarters, 2 dimes, and 4 pennies.

4 0
3 years ago
50 POINTS
NeX [460]

Answer:

o I = 4 cm, w = 9 cm, h = 3 cm  

Step-by-step explanation:

The volume is given by V = l*w*h

w = 6 cm, I = 4,cm, h = 4 cm    V= 6*4*4 = 96

o w = 7 cm, h = 3 cm, I = 5 cm   V = 7*3*5 =105

o I = 4 cm, w = 9 cm, h = 3 cm   V = 4*9*3 =108

o h = 5 cm, w = 6 cm, I = 3 cm  V = 5*6*3 =90

The largest volume is

o I = 4 cm, w = 9 cm, h = 3 cm   V = 4*9*3 =108

8 0
3 years ago
Read 2 more answers
Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. Whe
podryga [215]

Answer:

The value  is  n = 384

The correct option is a

Step-by-step explanation:

From the question we are told that

   The margin of error is  E =  0.05

From the question we are told the confidence level is  95% , hence the level of significance is    

      \alpha = (100 - 95 ) \%

=>   \alpha = 0.05

Generally from the normal distribution table the critical value  of   is  

   Z_{\frac{\alpha }{2} } =  1.96

Generally since the sample proportion is not given we will assume it to be

      \^ p = 0.5

Generally the sample size is mathematically represented as  

    n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )

=>   n = [\frac{ 1.96 }{0.05} ]^2 *0.5 (1 - 0.5)

=>   n = 384

Generally the margin of error is mathematically represented as  

      E = Z_{\frac{\alpha }{2} } *  \frac{\sigma }{\sqrt{n} }

Generally if the level of confidence increases,  the critical value of  \frac{\alpha }{2}  increase and from the equation for margin of error we see the the critical  value varies directly with the margin of error , hence the margin of error  will increase also  

So  If the confidence level is increased, then the sample size would need to increase because a higher level of confidence increases the margin of error.

8 0
3 years ago
The population of a city increases by 4000 people each year. In 2025, the population is projected to be 450,000 people. What is
luda_lava [24]
P = 390,00 + 4000x

450,000 people - (15years x 4000) = 390k in 2010
 
15 years is the difference between 2010 and 2025
subtract 60k (that is the 15 years multiplied by 4k) from 450k and you get 390k.

Sorry if my explanations suck, I'm not great at explaining my thought process
5 0
3 years ago
Simplify the product using FOIL (3x+4) (2x-6)
____ [38]
(3x+4) (2x-6)
6x-18x+4x-24
6x^{2} -14-24
5 0
3 years ago
Read 2 more answers
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