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
zmey [24]
3 years ago
15

I need help please and thank you

Mathematics
1 answer:
BartSMP [9]3 years ago
6 0

Answer:

  3.33×10⁴

Step-by-step explanation:

You can use the hint, or you can use a common exponent. Here is the latter case.

  (3.9×10⁴) -(5.7×10³) = (3.9×10⁴) -(0.57×10⁴) = (3.9 -0.57)×10⁴

  = 3.33×10⁴

_____

With a little practice, you can see the effect on exponents of moving the decimal point. Here, we have ...

  5.7×10³ = (0.57×10)×10³ = 0.57×(10×10³) = 0.57×10⁴

__

When adding or subtracting in scientific notation, all that is required is that the exponents of all the numbers be the same. The hint says make all the exponents be 0. Above, we have chosen to make them all be 4. You could also use 3:

  (3.9×10⁴) -(5.7×10³) = (39×10³) -(5.7×10³) = (39 -5.7)×10³

  = 33.3×10³ = 3.33×10⁴

You might be interested in
PLEASE HELP ME JUST A LITTLE CONFUSED.
Usimov [2.4K]

The answer is

2(5x-6)≤x+24

3 0
3 years ago
Professor Halen teaches a College Mathematics class. The scores on the midterm exam are normally distributed with a mean of 72.3
lbvjy [14]

Answer:

14.63% probability that a student scores between 82 and 90

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 72.3, \sigma = 8.9

What is the probability that a student scores between 82 and 90?

This is the pvalue of Z when X = 90 subtracted by the pvalue of Z when X = 82. So

X = 90

Z = \frac{X - \mu}{\sigma}

Z = \frac{90 - 73.9}{8.9}

Z = 1.81

Z = 1.81 has a pvalue of 0.9649

X = 82

Z = \frac{X - \mu}{\sigma}

Z = \frac{82 - 73.9}{8.9}

Z = 0.91

Z = 0.91 has a pvalue of 0.8186

0.9649 - 0.8186 = 0.1463

14.63% probability that a student scores between 82 and 90

3 0
3 years ago
What are the roots of 12x = 9 + 5x2?
marusya05 [52]
Minus 12x both sides
0=5x^2-12x+9
use quadratic formula
for 0=ax^2+bx+c
x=

given
5x^2-12x+9
a=5
b=-12
c=9
remember: i=√-1 

3 0
3 years ago
D Question 1 10 pts Which digit is in the hundredths place of 107.263? 07 2 6 Question 2 10 pts
enot [183]

Answer:

6

Step-by-step explanation:

We are given the number 107.263.

Using place value, locate the hundredths place.

107.2<u>6</u>3

The number 6 is in the hundredths place.

Hope this helps.

4 0
3 years ago
<img src="https://tex.z-dn.net/?f=%5Csqrt%7B%5Cfrac%7B36%7D%7B169%7D%7D" id="TexFormula1" title="\sqrt{\frac{36}{169}}" alt="\sq
otez555 [7]

Answer:

0.0355029585799?

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • Mofor’s school is selling tickets to the annual dance competition. On the first day of ticket sales the school sold 7 adult tick
    12·1 answer
  • Part of the graph of the function f(x) = (x - 1)(x + 7) is
    11·2 answers
  • 1. A recipe calls for cups of flour, cup of white sugar, and cup of brown sugar. The recipe makes 6 servings. (a) How many cups
    11·1 answer
  • 220-109.4 how to solve ?
    12·2 answers
  • X 3 4 x is 1/2 idk it .. if you can help thank you so much it’s math .
    5·1 answer
  • One marble is selected at random from a bowl containing 15 blue marbles and 12 red marbles. What are the odds of selecting a blu
    10·2 answers
  • Find the midpoint of the line segment with the given endpoints: (- 9, 3)(7, - 8)
    10·1 answer
  • Solve for x thanks!!!!!
    8·2 answers
  • I need help with this question please
    10·1 answer
  • 22. A garage sale raise $400 for a school trip. Ir 15% of the money covered point
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!