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
Vera_Pavlovna [14]
3 years ago
9

- 7th Grade Work - Please help, and answer only if you have an answer for this problem.

Mathematics
2 answers:
Serggg [28]3 years ago
8 0

Answer:

8.5

Step-by-step explanation:

120 * 0.4 = 48 + 20 = 68

120 * 0.45 = 54 + 22.25 = 76.5

76.5 - 68 = 8.5

max2010maxim [7]3 years ago
6 0
8.5
what they said!!
You might be interested in
The cafeteria uses rectangular trays with a raised edge around them. The area of the flat surface of each tray is 228 Inches squ
solong [7]

Answer: D 62 inches

Step-by-step explanation: Given area of each tray = 228 in2 inches

7 0
3 years ago
Read 2 more answers
Use any of the methods to determine whether the series converges or diverges. Give reasons for your answer.
Aleks [24]

Answer:

It means \sum_{n=1}^\inf} = \frac{7n^2-4n+3}{12+2n^6} also converges.

Step-by-step explanation:

The actual Series is::

\sum_{n=1}^\inf} = \frac{7n^2-4n+3}{12+2n^6}

The method we are going to use is comparison method:

According to comparison method, we have:

\sum_{n=1}^{inf}a_n\ \ \ \ \ \ \ \ \sum_{n=1}^{inf}b_n

If series one converges, the second converges and if second diverges series, one diverges

Now Simplify the given series:

Taking"n^2"common from numerator and "n^6"from denominator.

=\frac{n^2[7-\frac{4}{n}+\frac{3}{n^2}]}{n^6[\frac{12}{n^6}+2]} \\\\=\frac{[7-\frac{4}{n}+\frac{3}{n^2}]}{n^4[\frac{12}{n^6}+2]}

\sum_{n=1}^{inf}a_n=\sum_{n=1}^{inf}\frac{[7-\frac{4}{n}+\frac{3}{n^2}]}{[\frac{12}{n^6}+2]}\ \ \ \ \ \ \ \ \sum_{n=1}^{inf}b_n=\sum_{n=1}^{inf} \frac{1}{n^4}

Now:

\sum_{n=1}^{inf}a_n=\sum_{n=1}^{inf}\frac{[7-\frac{4}{n}+\frac{3}{n^2}]}{[\frac{12}{n^6}+2]}\\ \\\lim_{n \to \infty} a_n = \lim_{n \to \infty}  \frac{[7-\frac{4}{n}+\frac{3}{n^2}]}{[\frac{12}{n^6}+2]}\\=\frac{7-\frac{4}{inf}+\frac{3}{inf}}{\frac{12}{inf}+2}\\\\=\frac{7}{2}

So a_n is finite, so it converges.

Similarly b_n converges according to p-test.

P-test:

General form:

\sum_{n=1}^{inf}\frac{1}{n^p}

if p>1 then series converges. In oue case we have:

\sum_{n=1}^{inf}b_n=\frac{1}{n^4}

p=4 >1, so b_n also converges.

According to comparison test if both series converges, the final series also converges.

It means \sum_{n=1}^\inf} = \frac{7n^2-4n+3}{12+2n^6} also converges.

5 0
3 years ago
True or false? f (x) = 2 · (1/5)^x represents an exponential function growth.
nekit [7.7K]

Hi there!

\large\boxed{\text{False.}}

f(x) = 2(1/5)ˣ

Recall the form of an exponential function:

f(x) = a(b)ˣ where:

a = initial value

b = rate of decay/growth

If b > 1, the function is undergoing exponential growth. If b < 1, then the function is undergoing exponential decay.

1/5 < 1, so the function is undergoing exponential decay, not growth.

7 0
3 years ago
A basketball costs $12. there is a 7% sales tax charge on this item and shipping costs are 5.23. what is the total cost to purch
Leviafan [203]
12(.07) + 5.23
.84 + 5.23
6.07

12 + 6.07
18.07
4 0
3 years ago
Reflect on the concept of function. What concepts (only the names) did you need to accommodate the concept of function in your m
disa [49]
The answer is idk cause idk
4 0
3 years ago
Other questions:
  • There are 2 orange picks for every 5 picks if there are 21 picks in total how many picks are orange
    15·1 answer
  • Grand kfstusufsjshfssjg
    9·1 answer
  • What is the total area of the two shapes
    6·2 answers
  • What are the domain and range of f(x)=logx-5?
    14·1 answer
  • Universal pet house sales sells vinyl doghouses and treated lumber doghouses
    6·2 answers
  • 2. The German Shepard actually weighs 28 pounds. Lisa thought the
    12·1 answer
  • I don't understand help plz​
    13·2 answers
  • Find the area of the triangle <br>answer in digital format only ​
    9·1 answer
  • 6 / 2 ( 1 + 2) = ? <br><br><br> btw the / is the division sign
    11·2 answers
  • Which equation is correct?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!