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padilas [110]
3 years ago
10

A radioactive isotope that was originally 275 grams has decayed to 150 grams. the equation shown can be used to calculate the nu

mber of years/T, it took for the decay to occur
150 + 275e ^-0.1386t
what is the approximate number of years it took for the isotope to decay for 275 grams to 150 grams?

A.0.1 years
B.0.4 years
C.1.9 years
D.3.9 years
E.4.4 years
Mathematics
2 answers:
agasfer [191]3 years ago
4 0

Answer: 4.4

Step-by-step explanation:

k0ka [10]3 years ago
3 0

Answer: 4.4 years

Step-by-step explanation:

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The manager of hockey team says that the probability that team win the next match is 0.5 and the probability it will lose is 0.2
dybincka [34]

Answer:

Step-by-step explanation:

The team draws with a probability of 1 = (0.5 + 0.2) = 0.3

If the team does not win then it loses or draws.

Loosing = 0.2

Draw := 0.3

P(not win) = 0.2 + 0.3 = 0.5

======================

Not lose means wins or draws.

P(not lose) = 0.5 + 0.3 = 0.8

======================

Not Draw means wins or loses

P(not draw) = 0.5 + 0.2 = 0.7

Of course all of these could be done more directly.

P(not win)= (1 - win) = 1- 0.5 = 0.5

P(not lose) =  ( 1 - lose) = 1 - 0.2 = 0.8

P(not draw) = (1 - 0.3) = 0.7

3 0
3 years ago
F(x)=8x +5, which function represents f(e-9)
Ronch [10]

Answer:

f(e - 9) = 8e - 67

Step-by-step explanation:

To evaluate f(e - 9) substitute x = e - 9 into f(x)

f(e - 9) = 8(e - 9) + 5 = 8e - 72 + 5 = 8e - 67

7 0
3 years ago
A square notepad has sides that are 10 centimeters long. What is the notepad's area?
blsea [12.9K]

Answer:

100cm²

Step-by-step explanation:

The notepad is square.

The area of a square = length X width.

All the sides of a square are the same length.

Therefore, the area of the notepad = 10 X 10 which equals 100.

Don't forget the units!

The units for area is cm².

The units for volume is cm³.

This is area so your answer is 100cm².

Hope this helped, have a nice day!

8 0
1 year ago
PLEASE HELP EASY MATH
prisoha [69]
Unit rates are easy you just take the first number and divide it by your second
15 divided by 5 is = 3
75 divided by 25 is = 3
80 divided by 4 is = 20
Please mark brainiest
Have a amazing day
4 0
2 years ago
Tickets to a school musical cost $7.25. The amount received from ticket sales is $833.75. How many tickets were sold?
KonstantinChe [14]

Answer:  115

Divide 833.75 by 7.25

5 0
3 years ago
Read 2 more answers
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