The avarage is 180:18=10 , 10 min per hole
Answer:
2.25 or 2 1/4
Step-by-step explanation:
Easy. you add them like regular numbers. 1/4 + 2 = 0.25 + 2 =2.25 and/or 2 1/4
For this case we have an equation of the form:
y = A * (b) ^ t
Where,
A: initial amount
b: decrease rate
t: time in years.
Substituting values we have:
7 = A * (0.5) ^ ((1/20) * t)
For t = 45 years we have:
7 = A * (0.5) ^ ((1/20) * 45)
Clearing A:
A = 7 / ((0.5) ^ ((1/20) * 45))
A = 33.3
Answer:
the density of the substance when it was deposited 45 years ago was:
A = 33.3 milligrams per square centimeter
4/7. Divide the numerator and denominator by 15.
Answer: George can make 2/3 section of fence an hour.
Explanation: If george can make 1/3 section every half hour than he can make double 1/3 every hour.
1/3 + 1/3 = 2/3
He can make 2/3 every hour.