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2 years ago

I have these questions, would someone mind answering them?

Mathematics

1 answer:

aleksley [76]2 years ago

5 0

Answer:

1a) 0.03 = 3/100 = 3%

2b) 0.08 = 8/100 = 8%

3c) 0.4 = 4/100 =4%

4d) 3/90

5e) 4/90

Step-by-step explanation:

a, b, c we multiply the probability of each one green = 1/10 red = 3/10 blue = 4/10 yellow = 2/10

They are independant and they are replaced.

2a ) they are dependent as they are not replaced so before multiplying we see the total is reduced each turn. From 1/10 to 3/9 for green and red.

They mention independent as they stay independent per 2 picks.

Meaning red is dependant on green but yellow is not dependant on when we pick for red its only dependant for blue.

1 x 3 = 3 10x 9 = 90 = 3/90 green and red

2 x 4 = 8 10 x 9 = 90 = 4/90

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CosA/secA+sinA/cosecA=1

Alona [7]

Step-by-step explanation:

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1 year ago

A large mixing tank initially contains 1000 gallons of water in which 30 pounds of salt have been dissolved. Another brine solut

serg [7]

Answer:

(B) $\dfrac{dA}{dt}=8-0.004A$

Step-by-step explanation:

Volume of fluid in the tank =1000 gallons

Initial Amount of Salt in the tank, A(0)= 30 pounds

Incoming brine solution of concentration 2 pounds of salt per gallon is pumped in at a rate of 4 gallons per minute.

Rate In=(concentration of salt in inflow)(input rate of brine)

$=(2\frac{lbs}{gal})( 4\frac{gal}{min})=8\frac{lbs}{min}$

The resulting mixture is pumped out at the same rate, therefore:

Rate Out =(concentration of salt in outflow)(output rate of brine)

$=(\frac{A(t)}{1000})( 4\frac{gal}{min})=\frac{A}{250}$

Therefore:

The rate of change of amount of salt in the tank,

$\dfrac{dA}{dt}=$Rate In-Rate out\\\dfrac{dA}{dt}=8-\dfrac{A}{250}\\\dfrac{dA}{dt}=8-0.004A$

5 0

3 years ago

Look at the two temperatures. How much have they changed by?<br> 4 degrees to -10 degrees

aliina [53]

Answer:

$\displaystyle 14$

Step-by-step explanation:

we are given two temperature

4 degrees and -10 degrees

since it says to figure out the changed

substract

$\displaystyle 4 - ( - 10)$

remove parentheses and change its sign

$\displaystyle 4 + 10$

simplify addition:

$\displaystyle 14$

and we are done!

4 0

2 years ago

Read 2 more answers

What percent of a dozen is 3

Margaret [11]

Answer:

25%

Step-by-step explanation:

Percentages are one of several ways of describing quantities' relationships to one another. Specifying one number as a percentage of another means specifying the fraction of the second quantity the first comprises. The percentage value is the number that, divided by 100, equals that fraction. To express the percentage as a whole number, round it accordingly. Some applications, however, don't require percentages as exact whole figures.

Divide the first number the second. For instance, if you want to find what percentage 43 is out of 57, divide 43 by 57 to get 0.754386.

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2 years ago

The diagonals of a square are 4 meters long. The side of this square is equal to the diagonal of a second square. Find the side

jok3333 [9.3K]

Check the picture below.

since the second figure is also a square, then the sides touching the diagonals have to be all equal, and that'd only happen if those sides bisects the larger square's diagonal.

3 0

3 years ago