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Rudik [331]
3 years ago
10

Please HELP!!!

Mathematics
1 answer:
Sveta_85 [38]3 years ago
5 0
After 20 years, the substance would’ve been 18 milligrams. If there had been another 20 years, it would’ve been 36 milligrams, but since it’s only 15 years and 15 is 75% of 20 years, then you’d do .75•18, which is the number you’d have added. This will equal 13.5. Then you do 18+13.5 to get 31.5. This means that 35 years ago, the substance had been 31.5 milligrams.
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Can someone help me with these 2?
lesya [120]

answer: 1 over 165 step by step: #1 Evaluate the power 5 to the power of 1= 5 because any expression raised to the power of 1 if u asking what's is an expression the expression is five and together is 5 to the power of 1) #2 if a term like five doesn't have a exponent the exponent is 1) #3 remove the parathesis ) #4 subtract 1 and -2 u get 1 over 5 to the power of -4 and 5 to the power of negative four is 1 over 165) the second I don't know

6 0
4 years ago
Which definite integral can be expressed as lim‖P‖→0∑k=1n(3ck2+2ck)Δxk where P is any partition of [3,7]?
Delvig [45]

Answer:

Check image.

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
The hanger image below represents a balanced equation.
goldfiish [28.3K]
I think you forgot to put the image in the question
3 0
3 years ago
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The price of a company's share dropped by 3.50% by the end of the first year, down to $44.25. During the second year the price o
omeli [17]

Answer:

a. $45.86

b. $43.87

c. Percentage change = -4.40%)

Step-by-step explanation:

a. Let the price of share at the beginning of first year be represented with X

Now, Price of company's share dropped by 3.50% at the end of first year.

So, Price of share at the end of first year = x - 3.5% of x

= x - 0.035x

= 1x - 0.035x

= 0.965x

But it is equal to $44.25

=> 0.965x = 44.25

x = 44.25 / 0.965  

x = 45.8549223

x = $45.86

b. During second year price of share decreased by $1.99. Therefore, Price of share at the end of second year = $45.86 - $1.99  = $43.87

c. Percentage change in the price of shares over two years = {(45.86 - 43.87)/45.86} *100

= (1.99/45.86)*100

= 0.04339294 * 100

= 4.40%

Now, as price of shares has dropped, the percentage change will be negative. (Δ% = -4.40%)

5 0
3 years ago
Is 5 and four fifths = 5.8
nekit [7.7K]
Yes. That's exactly right. Good work.
6 0
4 years ago
Read 2 more answers
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