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3 years ago

I don't get this I really need help to understand this "/

Mathematics

1 answer:

Alisiya [41]3 years ago

4 0

I don't either it is quite hard to be fair

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Can someone help me with this question

Doss [256]

Answer:

Step-by-step explanation:

For any prism or cylinder for that matter, you can find the volume by multiplying the area of the base times the height. So this problem just becomes simple algebra.

B * h = V

25 * h = 80

h = 80/25

h = 3.2

If you don't get why it's the area of the base let me know and I can try to explain it.

4 0

2 years ago

What are the dimensions of the cross section formed by

saw5 [17]

Answer:

rectangle, 5,4

Step-by-step explanation:

i just did the assignment and got it right

4 0

2 years ago

Use theorem 7.1.1 to find {f(t)}. (write your answer as a function of s.) f(t) = t2 + 5t − 6 {f(t)} =

bulgar [2K]

General Idea:

Let $f$ be a function defined for $t\geq 0$ . Then the integral

$L\{f(t)\}=\int\limits^\infty_0 {e^{-st}f(t)} \, dt$

is said to be Laplace transform of $f$ , provided that the integral converges.

$L\{1\}=\frac{1}{s} \\ \\ L\{t^n\}=\frac{n!}{s^{n+1}} , \; \; \; n=1,\;2, \;3,...$

Applying the concept:

$L\{f(t)\}=L\{t^2\}+L\{5t\}-L\{6\}=\frac{2}{s^3} +\frac{5}{s^2} -\frac{6}{s}$

3 0

3 years ago

Read 2 more answers

Mr. Johnson needs to buy seed for his backyard lawn.

Romashka [77]

Answer:

a. He will need $2,075.7\ ft^2$ of seed to cover the entire area.

b. He will need 5 bags of seed if he uses the highest setting and 7 bags of seed if he uses the lowest setting.

Step-by-step explanation:

a. You can calculate the area of his lawn by multiplying its dimensions.

The dimensions are:

$40\frac{4}{5}\ ft$ by $50\frac{7}{8}\ ft$

We can convert the mixed numbers to decimal numbers. To do this,we must divide the numerator by the denominator of the fraction and then we must add the quotient to the whole number part.

Then, these are:

$(40+0.8)\ ft=40.8\ ft$

$(50+0.875)\ ft=50.875\ ft$

Then:

$Area=40.8\ ft*50.875\ ft\\\\Area=2,075.7\ ft^2$

He will need $2,075.7\ ft^2$ of seed to cover the entire area.

b. Let be "h" the number of bags of seed that he will need if he uses the highest setting.

You know that one bag of seed will cover 500 square feet if he uses the highest setting. Then:

$h=\frac{2,075.7\ ft^2}{500\ ft^2}\\\\h=4.15\\\\h\approx5$

Let be "l" the number of bags of seed that he will need if he uses the lowest setting.

You know that one bag of seed will cover 300 square feet if he uses the lowest setting. Then:

$l=\frac{2,075.7\ ft^2}{300\ ft^2}\\\\l=6.9\\\\l\approx7$

5 0

3 years ago

Read 2 more answers

Help me please justify each step 9x/4=-9 9x=-36 x=-4

Nesterboy [21]

$\dfrac{9x}{4}=-9\ \ \ |\text{Multiplication Property of Equality}\\\\4\cdot\dfrac{9x}{4}=4\cdot(-9)\\\\9x=-36\ \ \ \ |\text{Division Property of Equality}\\\\\dfrac{9x}{9}=\dfrac{-36}{9}\\\\x=-4$

6 0

3 years ago

Read 2 more answers