The gyms can be represented by these equations, with x for months. 40x+55= 30x+125. Combine like terms. First, subtract 30x from both sides, and you get 10x+55=125. Subtract 55 next. You now have 10x=70. Divide by 10, and you get x=7. It will take 7 months for them to be the same. To find the cost, you can plug in x. 40(7)+55=335. 30(7)+125=335. The cost is $335.
Answer:
D
Step-by-step explanation:
Volume of a cone is (1/3)πr^2h.
You have the necessary info, so just plug it in. (1/3)*π*(3/2)^2*(9/4)
Simply use a protractor. Remember, sometimes triangles can be impossible to draw with improper values!
Answer:
A
Step-by-step explanation:
A is the answer I'm sure of it
Answer: There will 486 bacteria in 31 hours.
Step-by-step explanation:
The population decay in bacteria is exponential.
Exponential function : , where A = initial population, b multiplication decay factor, t= time:
As per given:
Initial population:
After 36 hours, population =
Divide both sides by 120,000 we get
Taking natural log on both sides , we get
At x= 31,
Hence, there will 486 bacteria in 31 hours.