eric practiced piano and guitar for a total of 8 hours this week . He practiced the piano 1/4 of that time. How many hours did e
2 answers:
Answer: Eric practiced piano for 2 hours this week.
Step-by-step explanation: Given that Eric practiced piano and guitar for a total of 8 hours this week . He practiced the piano of that time.
We are to find the number of hours that Eric practiced the piano this week.
Let, 'h' represents the number of hours that Eric practiced piano this week.
Then, according to the given information, we have
Thus, Eric practiced piano for 2 hours this week.
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Answer:
Area of Circle A = 1133.54
Circumference of Circle A= 119.32
Step-by-step explanation:
Given: Sum of both circle diameters= 49 feet.
Circle A radius= Three feet less than twice the diameter of circle B.
Lets assume diameter of Circle B is "x"
∴ Circle A radius (r)=
We know, the diameter of circle is
Diameter of Circle A is
Next as given sum of both circle diameter is 49 feet.
∴
distributing 2 with 2x and -3
⇒
⇒
Adding both side by 6
⇒
Cross multiplying both side.
⇒
∴ Diameter of circle B is 11 feet.
Next, subtituting the value of x to get the value of radius for Circle A.
Radius of circle A=
⇒ Radius of circle A=
∴ Radius of circle A= 19 feet.
Area of circle=
Taking π= 3.14
Area of circle A=
∴ Area of circle A= 1133.54
Circumference of circle= 2πr
Circumference of Circle A=
∴ Circumference of Circle A= 119.32