1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mashutka [201]
3 years ago
13

Multiply (2.5 x 10 ^-8) ( 9x10 ^ - 10 ) Express answer in scientific notation

Mathematics
2 answers:
abruzzese [7]3 years ago
7 0

when you multiply scientific notation numbers add the exponents ( -8 + -10 = -18)

 now multiply 2.5 *9 = 22.5

 so you now have 22.5x10^-18

now make 22.5 a real scientific number by moving the decimal point 1 place to the right, which subtracts 1 from the exponent

 so you get:

2.25x10^-17

earnstyle [38]3 years ago
4 0
2.25 x 10^-17. Because it's negative you move the decimal to the left. So 2.5 x 10^-8 is .000000025 and 9 x 10^-10 is .0000000009.
You might be interested in
X2+(-x)+(-3x2)+(-5x)+12
mrs_skeptik [129]
2(4-3x) is the answer to X2+(-x)+(-3x2)+(-5x)+12
7 0
2 years ago
Use algebraic methods to prove that the given function has an x-intercept that is equal to its y-intercept. In your final answer
Llana [10]

Given the function, y = x/( x^2 – 1)

Add x and subtract x from (x^2 – 1) to make it a complete square

y = x/(x^2 + x – x – 1)

 y = x/[x(x + 1) – 1(x + 1)]

y = x/[(x – 1)(x + 1)]

 

 

In order to find the y -intercept, we set x = 0

When x = 0

y = 0/[(0 – 1)(0 + 1)]

y = 0.

Therefore, the y-intercept is zero.

 

In order to find the x -intercept, we set y = 0

When y = 0

0 = x/[(x – 1)(x + 1)]

The only way the product of a division will be zero is if the numerator is zero

So, if x/[(x – 1)(x + 1)] = 0

x = 0

Therefore, the x-intercept is also zero.

 

Since both x- intercept and y- intercept equal zero,

Then, the given function has an x-intercept that is equal to its y-intercept

5 0
3 years ago
Read 2 more answers
Can someone help me solve D, a, or/and b
Margaret [11]

Answer:

slop = (175 - 125) \div (2 - 1) = 50 \\ y - 125 = 50 \times (x - 1) \\ y = 50x - 50 + 125 \\ y = 50x + 75

you can solve problems by this equation

4 0
3 years ago
Brianna bought 5 bananas for 1 dollar. Sal bought 5 bananas at $.49 a pound. If a banana weighs about 5 ounces, who got the bett
vfiekz [6]

Answer:

Sal

Step-by-step explanation:

4 0
2 years ago
Sandra saves 12% of her salary for retirement. This year her salary was $3000 more than in the previous year, and she saved $420
Jet001 [13]

The previous year's salary is x.

This year's salary is x + 3000.

12% of this year's salary is $4200.

12% * (x + 3000) = 4200

0.12(x + 3000) = 4200

x + 3000 = 35,000

x = 32,000

Answer: Her salary in the previous year was $32,000.

3 0
3 years ago
Other questions:
  • It takes Ernesto 27 minutes to walk from his house to the
    8·1 answer
  • SOMEONE HELP ASAP PLEASE ):
    13·1 answer
  • Find the difference between the medians of Set A and Set B as a multiple of the interquartile range of Set A. A) 1 2 B) 3 4 C) 1
    7·2 answers
  • | 15. Write an equation and solve.
    11·1 answer
  • Can someone answer this math question for me please and thank you
    5·1 answer
  • What is the perimeter of PQR? Show your work.
    10·2 answers
  • Find two numbers that round to 15.5 when rounded to the nearest tenth write the numbers in the box
    10·2 answers
  • Write a linear equation representing a line parallel to y axis and is at a distance 3 units on the right side of y axis
    12·1 answer
  • Saw a board 5 ft 1 in. Long into six equal pieces. If the loss per cut is 1/5 in., how long will each piece be?
    9·1 answer
  • Can you help me for real thank you a bunch
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!