Answer:
G
Step-by-step explanation:
vertex formula = a(x-h)^2 + k
vertex is (h, k) so (-1, -4) means
y = a(x+1)^2-4
passes through (1, 8) so when x = 1 and y = 8
8 = a(1+1)^2-4 = 4a - 4
4a = 4
a = 1
Answer:
wrong
Step-by-step explanation:
Answer:
Scuba diver started at 2 feet above the sea level, dove down 20 feet, and rose up 8 feet
Step-by-step explanation:
The initial number is 2 which is more than 0 that means the diver did not start at a ground level but above than that.
The negative 20 denotes that he went down the sea level, to the extent of the number provided in feet.
Further, after that dive the positive number provides the height in feet covered to rise up from the down level of dive.
Answer:
18 minutes
Step-by-step explanation:
A = A₀ (½)^(t / T)
where A is the final amount,
A₀ is the initial amount,
t is the time,
and T is the half life.
A = 140 when t = 10. Solve for the half life:
140 = 700 (½)^(10 / T)
0.2 = ½^(10 / T)
log 0.2 = (10 / T) log 0.5
10 / T = 2.32
T = 4.31
When A = 40, t is:
40 = 700 (½)^(t / 4.31)
0.057 = ½^(t / 4.31)
log 0.057 = (t / 4.31) log 0.5
t / 4.31 = 4.13
t = 17.8
Rounded to the nearest whole number, it takes 18 minutes.
B. -14
C. 12
D. 0
Hopefully this is right!
