This is equal to the probability that no light fail. Probability of one light not failing = 0.98.
P(no light fails) = 0.98^20 = 0.67 or 67% to nearest percent.
Answer:
(3, -1), 7
Step-by-step explanation:
To find the center of this circle: compare the given equation
(x - 3)^2 + (y + 1)^2 = 7^2 to the standard equation of a circle with center at (h, k):
(x - h)^2 + (y -k)^2 = r^2
From this comparison we see that the center is at
h = 3 and k = -1, and also that r must be 7: (3, -1), 7
5(x + 30)
x + 30 represents the number of minutes per day he practices
5 is the number of days he practices
so 5(x+30) = the total number of minutes he practices in 5 days
For example, if he practices the piano for 20 minutes per day and the violin for 30 minutes per day, he practices a total of 50 minutes per day. For 5 days that would be 5 x 50 = 250 minutes in 5 days.
Plug that into the equation
5(x+30) = 5(20+30) = 5(50) = 250
Answer:
Step-by-step explanation:
in a square pyramid the base area plus the area of the triangular faces is equal to the total area so we take (9*5) *1/2=22.5 then we multiply 22.5 *4= 90 so we take 90 + 5*5 = 115 so the total area is 115