Answer:
area of cube = a^2 ( a is side)
2.4^2 = 5.76 cm^2
Answer:
B (second option)
Step-by-step step 2, the LCD was not used correctly to make equivalent fractions.
Answer:
The answer is 20x + 45
Step-by-step explanation:
SO distribute 5 into 4x and 9 to get 20x + 45
Answer:
9 hours
Step-by-step explanation:
According to Newton's laws of cooling
dT/dt = -k(T - A)
Let U = T - A
dU/dT = 1
dU = dT
dt/dt = -kU
dT = -kU(dt)
dU/U = -kdt
On integration
ln(U) = -kt + C
U = Ce^-kt
T - A = Ce^-kt
T(0) = 68
T(5) = 25
68 - 20 = Ce^-k(0)
C = 48
and
25 -20 = 48e^-k(5)
5 = 48e^-5k
e^-5k = 5/48
-5k = ln (5/48)
k = - ln(5/48) / 5
k = - 0.4524
T - 20 = 48e^-0.4524t
When T = 21
21 -20 = 48e^-0.4524t
1 = 48e^-0..4524t
e^-0.4524t = 1/48
-0.4524t = ln (1/48)
t = - ln(1/48) / 0.4524
t = 8.5570
t= 9 hours ( to the nearest hour)
Answer:
Step-by-step explanation:
Solution
Let the original price = x
x - 34/100 x = 165,000
0.65x = 165 000 Divide by 0.65
0.65x/0.65 = 165000/0.65 Combine
Answer
x = 253846.15
