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3 years ago

Estimate 726 Times 5

Mathematics

1 answer:

tester [92]3 years ago

5 0

It's too easy just to calculate the actual value:

726 × 5 = 726 × 10/2 = 7260/2 = 3630

_____

You might estimate the value as 700 × 5 = 3500. You might estimate that to be low by 26/700 ≈ 4%, so about 140.

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If a couple plans to have 7 children, what is the probability that there will be at least one girl? Assume boys and girls are

Kisachek [45]

<h2>Answer with explanation:</h2>

Given : The number of children a family plans to have = 7

If the boys and girls are equally likely, then the probability of getting a girl = probability of getting boy = $\dfrac{1}{2}=0.5$

Now, the probability that there will be at least one girl will be:-

P(atleast one girl) = 1- P(all boys)

$=1-(\dfrac{1}{2})^7\\\\=1-0.0078125\\\\=0.9921875$

Hence, the probability that there will be at least one girl = 0.9921875

Since ,0.9921875 > 0.5

It means the event is likely to happen. [∵Any event E is likely to happen if P(E)>0.5]

Therefore, the probability is high enough for the couple to be very confident that they will get at least one girl in 7 children.

6 0

3 years ago

To increase him an amount by 70% what’s in the multiplier would you use

Sveta_85 [38]

You would multiply the amount by 1.70 for example increasing £50 by 70% would be £85

4 0

3 years ago

AHHH URGENT ANSWER QUICK I GIVE BRAINLIEST

Step2247 [10]

Answer:

20/54

Step-by-step explanation:

5 0

3 years ago

A gold coin appreciated in value from $200.00 to $475.00 in 6 years. Find the yearly rate of appreciation. Show or explain all w

Travka [436]

Answer:

16%

Step-by-step explanation:

To solve this we are using the standard growth equation:

$y=a(1+b)^x$

Were

$y$ is the final value after $x$ years

$a$ is the initial value

$b$ is the growth factor (yearly rate of appreciation in our case) in decimal form

$x$ is the time in years

We know from our problem that gold coin appreciated in value from $200.00 to $475.00 in 6 years, so $y=475$ , $a=200$ , and $x=6$ .

Let's replace the values in our equation and solve for $b$ :

$y=a(1+b)^x$

$475=200(1+b)^6$

$\frac{475}{200} =(1+b)^6$

$2.375=(1+b)^6$

$\sqrt[6]{2.375} =\sqrt[6]{(1+b)^6}$

$1+b=\sqrt[6]{2.375}$

$b=\sqrt[6]{2.375}-1$

$b=0.155$

which rounds to

$b=0.16$

Since our appreciation rate is in decimal form, we need to multiply it by 100% to express it as percentage:

0.16*100% = 16%

We can conclude that the yearly appreciation rate of our gold coin is approximately 16%

3 0

3 years ago

Write two perfect squares that each have a value greater than100 and less than 200

Trava [24]

Answer:

121, 144

Step-by-step explanation:

√121= 11

√144= 12

6 0

2 years ago