Answer:
168 cubic inches
Step-by-step explanation:
The parameters given are:
four 2 in. platys, seven 1 in. guppies, and a 3 in. loach,
Four 2 inches platys = 4 × 2 = 8 inches
Seven 1 inches guppies = 7 × 1 = 7 inches
A 3 inches leach = 3 inches
The smallest capacity tank you can buy will be
V = 8 × 7 × 3
V = 168 cubic inches
Therefore, the smallest capacity of tank you can buy is 168 cubic inches
We know that step function is a function that increases or decreases abruptly from one constant value to another. So we will use this logic to decide which of the following can be graphed using step function.
<u>a) the cost of a phone plane is $25 per month and 10 cents per minute.</u>
Answer : NO
Because payment doesn't changes abruptly as you can get payment even for 2 seconds using given pattern.
<u>b) McDonald's employees get paid $7.25 per hour up to 40 hours and they make $10.88 per hour if they work over $40 hours.</u>
Answer : NO
Because payment doesn't changes abruptly as you can get payment even for 1 minute using given pattern.
<u>c) A t-shirt company charges a flat fee of $35 plus $4 per shirt for up to 100 shirts, if more than 100 shirts are ordered, the cost is $35 plus $2 per shirt.</u>
Answer : NO
Because payment doesn't changes abruptly. cost is just calculated in two pieces which is more like piecewise function.
<u>d) A phone company charges $40 if you use less than 250 minutes, $75 if you use between 250-450 minutes, and $100 for more than 450 minutes.</u>
Answer : YES
Because the payment changes abruptly from $40 to $75 when number of minutes goes over 250
Lets say cost of cheeseburgers is x and cost of medium shake is y
so first fast food joint gives 2x+3y=8.98----------1
and nother one gives 7x+2y=15.45-----------------------2
multiply eq1 with 2
and multiply 3 to eq3
4x+6y=17.96
21x+6y=46.35
subtract both eq
-17x= - 28.39
cheese burger cost x=1.67 $ put x in eq1
medium shake cost y=1.88$
Also, FG=(2)^2+(-4)^2
FG=4+16
FG=20
so see which ones end up with 20
not A
not B
not C
D is the answer
