Well, the 89c bulb lasts twice as much, but costs less than twice as much. So, it's a better option. Here are two other ways to figure this out:
1) After 2000 hours, you will have used two 60c bulbs (each of them lasted 1000 hours). So, you will have spend 1.2 dollars. On the other hand, in the same 2000 hours, you would have needed only one 89c buls (which would have lasted the whole 2000 hours).
2) You can compute the dollars-per-hour ratio: spending 60c for 1000 hours means that you pay
dollars per hour. Similarly, the other bulb costs
dollars per hour, which is less.
First just ignore the dot and divide 24 by 6. 24/6=4. Then put the dot in front of the 4 and you will get 0.4.
Answer:
The correct answer is D) 1/27
Step-by-step explanation:
When you have a negative exponent, you put the number underneath 1 to get it to be positive. Then you may finish the operation. Therefore, 3^-3 becomes 1/(3^3). And 1/(3^3) is equal to 1/27
Answer:
Torrance spends 16$ on his brother
Step-by-step explanation:
You have 100$
So, we have
x (brother) + x (sister) + x (mother) = 100
But, since 10$ less will be spent on the sister than the brother, it becomes (x - 10) and twice + 6$ is spent on the mom, it also becomes (2x + 6)
Our equation then becomes
(x - 10) + x + (2x + 6) = 100
X will end up equaling 26. This is how much is spent on the sister.
(x - 10) will be substituted for (26 - 10), which equals 16.
I'm not sure if this is right so you might want to check with somebody (since I may be wrong) I hope this helps you understand how to basically do it though. <3
Circumference is 2(3.14)r. 2(3.14)(2.2). (6.28)(2.2) The circumference is approximately 13.816.