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3 years ago

What is the sum of 4.5 × 10^8 and 8.9 × 10^8?

Mathematics

1 answer:

Andrei [34K]3 years ago

4 0

Answer:

i think that the correct answer is a

Step-by-step explanation:

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What is 12÷2/5? Ty to everyone helping

Dvinal [7]

Answer:

<u>1.2</u> is the answer.

Step-by-step explanation:

12/2=6

6/5=1.3

Have a nice day!

4 0

3 years ago

3. What % of 100 is 13?

Sedbober [7]

Answer:

To get the solution, we are looking for, we need to point out what we know.

1. We assume, that the number 13 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 13 is 100%, so we can write it down as 13=100%.

4. We know, that x is 100% of the output value, so we can write it down as x=100%.

5. Now we have two simple equations:

1) 13=100%

2) x=100%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

13/x=100%/100%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 100% of 13

13/x=100/100

(13/x)*x=(100/100)*x - we multiply both sides of the equation by x

13=1*x - we divide both sides of the equation by (1) to get x

13/1=x

13=x

x=13

now we have:

100% of 13=13

Step-by-step explanation:

Have A Wonderful Day !!

5 0

3 years ago

The function f(x) = –x2 + 20x – 75 models the profit from one customer, in dollars, a shop makes for printing photos, where x is

trasher [3.6K]

The function is graphed as shown below

Part A:

We use the formula $- \frac{b}{2a}$ to find the vertex of the function. A quadratic function of the form of $a x^{2} +bx+c$ and equating this form to the given function $- x^{2} +20x-75$ , we have
$b=20$ and $a=-1$ .

Substituting $a$ and $b$ into the vertex formula, we have
$x=- \frac{20}{2(-1)}=10$ , as shown in the graph

This calculation means that the highest profit is achieved when the number of photo printed equals to ten photos

Part B:

We can find solution to this equation by factorising

$- x^{2} +20x-75=0$
$-( x^{2} -20x+75)=0$
$x^{2} -20x+75=0$
$(x-5)(x-15)=0$
$x=5$ and $x=15$ , as shown in the graph

The two values means that the company makes no profit when they either produce 5 or 15 photos

8 0

4 years ago

Rational number between 9.6 and 9.7

ELEN [110]

0.1 i guess ok so try my question but im not 100 sure its correct

3 0

4 years ago

Nancy gets a weekly allowance or $18. She spends $3 each week on art supplies. She splits the rest of her allowance into equal a

BARSIC [14]

Answer:

5 dollars a week

Step-by-step explanation:

18-3=15

15/3=5

5 0

2 years ago