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Helga [31]
1 year ago
5

How many times smaller is 4 x 10−7 than 3.5 x 10−4?

Mathematics
2 answers:
creativ13 [48]1 year ago
8 0

Answer:

B. 875

Step-by-step explanation:

Hope this helped

Tcecarenko [31]1 year ago
7 0

The 875 times smaller is 4 x 10−7 than 3.5 x 10−4.

<h3>What is the arithmetic operator?</h3>

Arithmetic operators are four basic mathematical operations in which summation, subtraction, division, and multiplication involve.,

Summation = addition of two or more numbers or variable

For example = 2 + 8 + 9

Subtraction = Minus of any two or more numbers with each other called subtraction.

For example = 4 - 8

Division = divide any two numbers or variable called division.

For example 4/8

Multiplication = to multiply any two or more numbers or variables called multiplication.

For example 5 × 7.

Given the two quantities 4 x 10−7 and 3.5 x 10−4

Now, if we divide this then

⇒ (3.5 x 10−4)/(4 x 10−7)

⇒ (35/40) × 10³

⇒ 875

Hence "The 875 times smaller is 4 x 10−7 than 3.5 x 10−4".

To learn more about the arithmetic operators,

brainly.com/question/25834626

#SPJ1

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Krista was assigned a homework problem that stated there were 45 stamps purchased for $18.75. Some stamps were 40 cents, and som
Korolek [52]

Answer: Krista put 0.40 in the first equation meant for the number of stamps

Step-by-step explanation: From the information available to Krista, she can determine the number of stamps that cost 40 cents and those that cost 55 cents. What she needs is a system of simultaneous equations both of which would use the total number of stamps and the total cost of stamps to determine the how many stamps cost 40 cents and how many costs 55 cents.

The system of equations should have been,

x + y = 45 ----------(1)

0.40x + 0.55y = 18.75 ----------(2)

From equation (1), let x be the subject of the equation and hence x = 45 - y

Substitute for the value of x into equation (2)

0.40(45 - y) + 0.55y = 18.75

18 - 0.40y + 0.55y = 18.75

Collect like terms and you now have

0.55y - 0.40y = 18.75 - 18

0.15y = 0.75

Divide both sides of the equation by 0.15

y = 5

When y has been calculated as 5, substitute for the value of y into equation (1)

x + y = 45

x + 5 = 45

x = 45 - 5

x = 40

The results show that the stamps that cost 0.40 cents (x) were 40 in number while those that cost 0.55 cents (y) were 5 in number.

This answer could not have been derived due to the mistake Krista committed when writing the equations.

4 0
3 years ago
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Ninety-five percent of students at an elementary school are between 3.6 feet tall and 5.5 feet tall. Assume the height data at t
vazorg [7]

Answer:4.55,0.47

Step-by-step explanation:

Given height varies from 3.6 feet to 5.5 feet for 95% student

i.e.

95% data falls in the interval of (\mu  -2\sigma ,\mu +2\sigma )

So

\mu -2\sigma=3.6-----------(1)

\mu +2\sigma=5.5 -----------(2)

Solving (1)&(2) we get

\mu =4.55

\sigma =0.475

Thus mean=4.55

And standard deviation=0.47

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LenKa [72]

Answer:

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5 0
2 years ago
The first three terms of a geometric sequence are as follows. -256, -64, -16. Find the next two terms of this sequence. Give exa
umka2103 [35]
Hi,


The next two are:

- 16 \div 4 =  - 4 \\  - 4 \div 4 =  - 1

Answer: -4 and -1


Hope this helps.
r3t40
4 0
2 years ago
Tony separates a number of paintbrushes, x, into 3 equally sized groups. He claims that this is the same as making a group 1/3 t
DochEvi [55]

Answer:

Size of each group = \frac{x}{3}

Step-by-step explanation:

Total number of paint brushes = x

Since each the three groups are equally sized, to get the number of paintbrushes in a group, we will have to divide the total number of paint brushes by 3

∴ We have, number of paint brushes in a group = \frac{Total number of paintbrushes}{3}\\

= \frac{x}{3}

this is also the same thing as saying \frac{1}{3}×\frac{x}{1}

This shows that the size of the new group is the same as \frac{1}{3} the size of the original group

4 0
3 years ago
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