Answer:
120
Step-by-step explanation:
So 10% <em>of</em> a number (let's use n) is 30.
The key word "of" tells us we need to multiply. Therefore, 10% times n is 30:
10% is the same as 0.1. So:
Divide both sides by 0.1:
So, our number is 300.
To find 40% of 300, multiply 0.4 and 300. Thus:
Our answer is 120.
And we're done!
Answer:
y = 2^x +5
Step-by-step explanation:
The number of new houses doubles each month, so the base (b) is that multiplier, 2. Then x is the number of months since the construction started (presumably at the end of the open house). If you want x to be something else, then h needs to be chosen so that (x -k) is the number of months the doubling has been taking place.
The value h represents the initial build of 5 houses. This is confirmed by the number 261 = 256 + 5 = 2^8 +5.
So, your equation for the number of houses built over time is ...
y = 2^x +5
I think it is 7060.54 it was all mental sorry
(0.300 kW) * (24 h/day) * (30 day) * ($0.07/kWh) = $15.12
825
1,800/120 = 15
55 x 15 = 825
