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4 years ago

How do you do addition and subtraction in Scientific Notatation?

1 answer:

6 0

Once the numbers have the same base and exponents, we can add or subtract their coefficients. Determine the number by which to increase the smaller exponent by so it is equal to the bigger exponent.

I hope this helps!

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Which equation solves this problem?

swat32

It would be C. im pretty sure. hope that helps you

8 0

3 years ago

A group of four numbers has an average of 14. The first three numbers are 11, 12 and 17. What's the missing number?

natali 33 [55]

Answer:

Step-by-step explanation:

So if 4 numbers have an average of 14, that means to find the sum of all 4 numbers, you work backwards & multiply 4x14 to get 56.

Then 56-the sum of the 3 numbers you already have (11+12+17=40)

56-40=16

To double check, to find the average of 4 numbers that total 56, you divide 56 by 4 & get 14

5 0

3 years ago

Nolan deposited $2300 into a savings account for which interest is compound weekly at a rate of 2.12%.

Shkiper50 [21]

p(1+r/n)^(r times n)

P is your start amount

R is rate as a decimal 5% would be 0.05

t is time (years)

n is the number of time compounded , weekly would be 52 times a year.

2300(1 + (0.0212/52))^(52 times 7)

2300(1.0004076)^(364)

6 0

4 years ago

Read 2 more answers

A survey was taken of twenty dentists about Sparkly toothpaste. Sixteen of the dentists recommended Sparkly toothpaste to their

Bas_tet [7]

Answer: There are 40 dentists who would recommended Sparkly toothpaste to their patients .

Step-by-step explanation:

Since we have given that

Out of 20 dentists, a survey was taken of about Sparkly toothpaste,

Number of dentists recommended Sparkly toothpaste to their patients = 16

Percentage of dentists who recommended Sparkly toothpaste to their patients be

$\frac{16}{20}\times 100=80\%$

Out of 30 dentists, a survey was taken of about Sparkly toothpaste,

Number of dentists recommended Sparkly toothpaste to their patients = 24

Similarly,

Percentage of dentists who recommended Sparkly toothpaste to their patients be

$\frac{24}{30}\times 100=80\%$

Now, we have asked to find the number of dentists recommended Sparkly toothpaste to their patients if survey was taken of 50 dentists.

As we have seen that there is always 80% of total number of dentists surveyed have recommended Sparkly toothpaste to their patients ,

so, According to this pattern , we get that

$\frac{80}{100}\times 50=40$

Hence, there are 40 dentists who would recommended Sparkly toothpaste to their patients .

5 0

3 years ago

I need you to Help please ASAP

gulaghasi [49]

Hey!

On the small triangle, the length is 3. On the bigger triangle, the length is 6.

Scale Factor:

$3 \times x = 6$

$6 \div 3 = 2 \\ x = 2$

The scale factor is 2

$\framebox{Scale Factor = 2}$

$x = 5.5 \times 2 \\ 5.5 \times 2 = 11 \\$

x is equal to 11

$\framebox{x = 11}$

4 0

3 years ago