Let x be the number of dime then the number of quarter will be 35-x
1 dime = 10 c & 1 quarter = 25 c, so
(x*10)+(35-x)(.25) = 575
-15x = -300
15x = 300 & x = 20 (dime) & Quarter = 15
Total distance walked = 1500 meters.
Dakota's r
ate is 60 meters per minute.
The equation for distance walked over time = r
⋅
t
.
Therefore the distance walked over t
ime = 60
⋅
t
The equation for distance remaining (let's call it R is 1500
−
(
60
⋅
t
).
so the remaining distance to walk after a time t can be written as
R
=
1500
−
(
60
⋅
t
)
Answer:
You are correct, it is 20% increase as:
(60/50) - 1 = 0.2 = 20%
P ( A ) = 0.45 - probability that the land has oil,
P ( B ) = 0.8 - probability that the test predicts it
P ( A ∩ B ) = P ( A ) · P ( B ) = 0.45 · 0.8 = 0.36
Answer: The probability that the land has oil and the test predicts it is 36 %.