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marysya [2.9K]
2 years ago
6

Pick number 1-10 if you get it right ill pay 50 dollas

Mathematics
1 answer:
vodka [1.7K]2 years ago
5 0
Answer: im going to guess 4 <3
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What is the difference 14/15 - 5/12 written as a decimal?
stiv31 [10]
14/15 - 5/12 

Common denominator is 60.

\frac{4 * 14}{4 * 15} -  \frac{5 * 5}{5 * 12}

56/60 - 25/60

= 31/60 as fraction.
= 0.516 as decimal.

5 0
3 years ago
Read 2 more answers
Evaluate S5 for 300 + 150 + 75 + … and select the correct answer below. 18.75 93.75 581.25 145.3125
Savatey [412]

we have that

300 + 150 + 75 +...

Let

a1=300\\ a2=150\\ a3=75

we know that

\frac{a2}{a1} =\frac{150}{300} \\\\ \frac{a2}{a1}=0.5 \\ \\ a2=a1*0.50

\frac{a3}{a2} =\frac{75}{150} \\\\ \frac{a3}{a2}=0.5 \\ \\ a3=a2*0.50

so

a(n+1)=an*0.50

Is a geometric sequence

Find the value of a4

a(4)=a3*0.50

a(4)=75*0.50

a(4)=37.5

Find the value of a5

a(5)=a4*0.50

a(5)=37.5*0.50

a(5)=18.75

Find S5

S5=a1+a2+a3+a4+a5\\ S5=300+150+75+37.5+18.75\\ S5=581.25

therefore

the answer is

581.25

Alternative Method

Applying the formula

S_n=\frac{a_1 (1-r^n)}{1-r} \\\\a_1=300 \\ r=\frac{1}{2}\\\\ S_5=\frac{300(1-(\frac{1}{2})^5)}{1-\frac{1}{2}}\\\\=\frac{300(1-\frac{1}{32})}{\frac{1}{2}}\\\\=\frac{300 \times \frac{31}{32}}{\frac{1}{2}}\\\\=\frac{75 \times \frac{31}{8}}{\frac{1}{2}}\\\\=\frac{\frac{2325}{8}}{\frac{1}{2}}\\\\=\frac{2325}{8} \times 2\\\\=\frac{2325}{4}\\\\=581 \frac{1}{4}\\\\=581.25

therefore

the answer is

581.25

6 0
3 years ago
Read 2 more answers
From a population of 200,000,000 elements, the standard deviation is known to be 14. A sample of 49 elements is selected. It is
Talja [164]

Answer:

The standard error of the mean = 2

Step-by-step explanation:

Given that:

The standard deviation σ = 14

The sample size n = 49

The sample mean \overline x = 56

The formula for calculating the standard error can be expressed as:

S.E = \dfrac{\sigma}{\sqrt{n}}

S.E = \dfrac{14}{\sqrt{49}}

S.E = \dfrac{14}{7}

S.E = 2

Therefore, the standard error of the mean = 2

4 0
3 years ago
You are cutting a rectangular piece of fabric in half along a diagonal. The fabric measures 28 inches wide and 1 1/4 yards long.
liubo4ka [24]

Answer:

45.61 inches

Step-by-step explanation:

Use the pythagorean theorem.

4 0
3 years ago
Read 2 more answers
What is the experimental probability?​
Greeley [361]

Answer:

11/50

Step-by-step explanation:

There are 22 3's, and 100 tries, so the experimental probability is 22/100 or 11/50.

6 0
2 years ago
Read 2 more answers
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