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3 years ago

Help with 10-14 questions plz

Mathematics

1 answer:

lesya [120]3 years ago

3 0

#10) 63,945 cubic inches.
#11) PRISM A = 120 cubic inches. PRISM B = 960 cubic inches. Prism B is 8 times greater in size.
#12) 58.4375 cubic centimeters.
#13) 58.5 inches.
#14) 3,860 grams.

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Use the cubic model y = 6x3 - 5x2 + 4x – 3 to estimate the value of y when x = 2.

jeka94

Answer:

The answer is B.

Step-by-step explanation:

You have to substitute x = 2, into the equation of y :

$y = 6 {x}^{3} - 5 {x}^{2} + 4x - 3$

$let \: x = 2$

$y = 6 {( 2)}^{3} - 5 {(2)}^{2} + 4(2) - 3$

$y = 48 - 20 + 8 - 3$

$y = 33$

5 0

2 years ago

Read 2 more answers

By what percent will the product of two numbers decrease if one of them is decreased by 25% and the other one is decreased by 50

olchik [2.2K]

Well, let's say the numbers are "a" and "b"

so a * b = ab

ok... now, if we reduce "a" by 25%, that means the new size is just 75% of the old one, how much is 75% of a? well, (75/100) * a, or 0.75a

now let's reduce "b" by 50%, that means the new size is 50% or half, how much is 50% of b? well (50/100)*b, or 0.5b

$\bf \begin{cases}
a\cdot b\implies ab\\
0.75a\cdot 0.5b\\
\qquad 0.75\cdot 0.5ab\\
\qquad 0.375ab
\end{cases}$

now, the new size of "ab" is just 0.375ab... well, let's revert the decimal format by simply multiplying by 100

0.375 * 100, is 37.5%

the new size of "ab" is just 37.5% of the original "ab"

it decreased by 100 - 37.5 or 62.5%

5 0

3 years ago

Tony is comparing two checking accounts. one has a monthly fee of $15 and a per-check fee of $0.20, and the other has a monthly

monitta

$20 minus $15 = $5 difference
$5 divided by $0.20 = 25 checks
*Now the accounts are even, except I haven't done the checks for the second account.*
25 checks times $0.10 = $2.50
$2.50 divided by $0.20 = 12.5 checks (round up in this case to 13)
*Now, you need to do 13 more checks on the second account*
13 checks times $0.10 = $1.30
$1.30 divided by $0.20 = 6.5 checks (round up in this case to 7)
*Now, you need to do 7 more checks on the second account*
7 checks times $0.10 = $0.70
$0.70 divided by $0.20 = 3.5 checks (round up in this case to 4)
*Now, you need to do 7 more checks on the second account*
4 checks times $0.10 = $0.40
$0.40 divided by $0.20 = 2 checks
*Now, you need to do 2 more checks on the second account*
2 checks times $0.10 = $0.20
$0.20 divided by $0.20 = 1 check
*Now, you need to do 1 more checks on the second account*
1 checks times $0.10 = $0.10
$0.10 divided by $0.20 = 0.5 checks (round up in this case to 1)
*Now, you need to do 1 more checks on the second account*
1 checks times $0.10 = $0.10
$0.10 divided by $0.20 = 0.5 checks
25 + 13 + 7 + 4 + 2 + 1 + 1 = 53 checks

Check your work!
Account #1- $15 + (53 times $0.20) = $25.60
Account #2- $20 + (53 times $0.10) = $25.30

Answer
53 checks

7 0

3 years ago

Whats the correct answer answer asap

natima [27]

The environmental threat in Japan and Korea that threatens food security is: B. soil erosion.

<h3>What is Soil Erosion?</h3>

Soil erosion can be defined as the washing away of the top soil that supports plants growth and also contains vital nutrients for plants growth.

Crops are grown majorly on land. The disruption of soil nutrients by soil erosion poses a serious environmental threat to food security in both Japan and Korea. Therefore, the answer is: B. soil erosion.

Learn more about soil erosion on:

brainly.com/question/17905503

#SPJ1

5 0

2 years ago

What is the percent of change from 4,000 to 600?<br> work too plz

xenn [34]

$\frac { n }{ 100 } \cdot 4,000=600\\ \\ 4,000\cdot n=60,000\\ \\ Therefore:\\ \\ n=\frac { 60,000 }{ 4,000 }$

$\\ \\ =\frac { 60\cdot 1,000 }{ 4\cdot 1,000 } \\ \\ =\frac { 60 }{ 4 } \\ \\ =15$

As 15% of 4,000 is 600, the percentage change was -85%.

4 0

3 years ago