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kati45 [8]
3 years ago
11

The number of fish in a lake decreased by 25% between last year and this year last year there were 60 fish in the lake what is t

he population this year? If you get stuck consider drawing a diagram
Mathematics
1 answer:
grandymaker [24]3 years ago
8 0

Answer:

45

Step-by-step explanation:

Decreasing by 25% means that there is 25% less of last years amount or 0.25x less. It also means that this year there is only 75% of what was last year actually in the lake or 0.75x. Since last year, there were 60 fish, this means this year there is 0.75(60) = 45. This year has 45 fish.

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Probably of Carl solving the 10 problems if there's 20 to study and he knows 15 and ten of the 20 are on the test.
Vladimir79 [104]

Answer:

1/3

Step-by-step explanation:

Probability of solving ten problems by Carl

Given

Total number of problems = 20

Number of problems studied by Carl = 15

Number of problems out of the 20 set of problem coming in test is 10

Case I - All ten problems come from the set of known 15 question

10/15 * 10/20 = 1/3

8 0
3 years ago
Harold bought 2 pairs of sandals for the same price. He also bought a pair of socks for $3. How much did one pair of sandals cos
DochEvi [55]
The answer would be each pair of sandals costed $14
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6 0
3 years ago
The weight of an object on mars is about 2/5 its weight on earth. how much would an 80 1/2 pound dog weigh on mars?
Paladinen [302]
Look at this equation it should help.

5 0
3 years ago
Read 2 more answers
$105 is what percent of $70?
REY [17]

Answer:

70$ =   150%   = 105 Divided by 1.5

Your answer is 150%

Another way of solving

105/70        0/100

Multiply 105 and 100= 10,500

then divide by 70 = 150

5 0
3 years ago
Which statements are true about exponential decay functions? Check all that apply. The domain is all real numbers. As the input
lorasvet [3.4K]
<h2>Answer:</h2>

The correct options are:

  • The domain is all real numbers.
  • The base must be less than 1 and greater than 0.
  • The function has a constant multiplicative rate of change.
<h2>Step-by-step explanation:</h2>

We know that the exponential function is given by:

                f(x)=ab^x

where a>0 and b are constants.

Also, it represents a growth function if b>1

and a decay function if 0<b<1

where b is the base.

  • x belongs to whole of the real numbers( since the exponential function is well defined for all the real values of x.

Hence, the domain of the function is all the real numbers )

  • Also, the graph of a decay function decreases continuously i.e. with the increasing input value the output value decreases.
  • The exponential decay function always have a constant multiplicative rate of change i.e. b.
8 0
3 years ago
Read 2 more answers
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