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jenyasd209 [6]
2 years ago
10

25 POINTS

Mathematics
2 answers:
ivolga24 [154]2 years ago
5 0

Answer:

c

Step-by-step explanation:

first-person point of view is when an author focuses on what one character sees/thinks/feels/believes

Keith_Richards [23]2 years ago
3 0

Answer:

is this like a multiple answer thing or is it 1

Step-by-step explanation:

if it's 1 answer I choose c

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Find the mass at time t=0. ANSWER HAS TO BE IN GRAMS
777dan777 [17]

For part (a) the answer is 400 grams for part (b) 198.63 grams and for part (c)  20 years.

<h3>What is exponential decay?</h3>

During exponential decay, a quantity falls slowly at first before rapidly decreasing. The exponential decay formula is used to calculate population decline and can also be used to calculate half-life.

We have an equation for radioactive decay:

\rm m(t) = 400e^{-0.035t}

a) Plug t = 0

\rm m(0) = 400e^{-0.035\times 0}

m(0) = 400 grams

b) plug t = 20 years

\rm m(20) = 400e^{-0.035\times 20}

After solving:

m(20) = 198.63 grams

c) Plug m(t) = m(0)/2 = 400/2 = 200 grams

\rm 200 = 400e^{-0.035t}

x = 19.80 years ≈ 20 years

Thus, for part (a) the answer is 400 grams for part (b) 198.63 grams and for part (c)  20 years.

Learn more about the exponential decay here:

brainly.com/question/14355665

#SPJ1

3 0
2 years ago
PLEASE HELP ASAP
Leviafan [203]

Answer:

  • -2/5

Step-by-step explanation:

<h3>Given</h3>
  • tan (x)=2/5
<h3>To find</h3>
  • tan (2pi - x)
<h3>Solution</h3>
  • tan (2pi - x) =
  • - tan (x) =
  • - 2/5

Correct choice is B

5 0
3 years ago
Read 2 more answers
Please help ASAP on question b
max2010maxim [7]

Answer:

13.9cm

Step-by-step explanation:

13^2 = 169

5^2 = 25

169 + 25

= 194

13.9

8 0
2 years ago
Read 2 more answers
The product of 26 X 93 is greater than 25 X 93. How much greater? Explain how you know without multiplying.
evablogger [386]

wouldn't it just be because 26 i greater then 25 there for aking 26x93 greater then 25x93

4 0
3 years ago
Find the area of the trapezoid below.
Pani-rosa [81]

Answer: 54 cm²

Step-by-step explanation: In this problem, we're asked to find the area of the trapezoid shown. A trapezoid is a quadrilateral with one pair of parallel sides.

The formula for the area of a trapezoid is shown below.

Area =\frac{1}{2} (^{b} 1 + ^{b}2)h

The <em>b's</em> represent the bases which are the parallel sides and <em>h</em> is the height.

So in the trapezoid shown, the bases are 6 cm and 12 cm and the height is 6 cm. Plugging this information into the formula, we have \frac{1}{2} (6 cm +12cm)(6 cm).

Next, the order of operations tell us that we must simplify inside the parentheses first. 6 cm + 12 cm is 18 cm and we have \frac{1}{2}(18 cm)(6 cm).

\frac{1}{2} (18 cm) is 9 cm and we have 9 cm · 6 cm of 54 cm²

So the area of the trapezoid shown is 54 cm².

7 0
3 years ago
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