Answer:
60 475
95 570
130 700
Step-by-step explanation:
subtract 95 from 60 then get that solution and add it to 95. then get 700 and subtract it from 130 then youll get 570 then subtract it again.
Answer:
D
Step-by-step explanation:
On the X side they add 2 every time to reach the next number needed. For example if it was to keep going the nect x would be 13
A mixed number is an addition of its whole and fractional parts.
2
+
1
3
Add
2
and
1
3
.
Tap for more steps...
7
3
The result can be shown in multiple forms.
Exact Form:
7
3
Decimal Form:
2.
¯
3
Mixed Number Form:
2
1
3
I got D.
There's a few ways to solve it; I prefer using tables, but there are functions on a TI-84 that'll do it for you too. The logic here is, you have a standard normal distribution which means right away, the mean is 0 and the standard deviation is 1. This means you can use a Z table that helps you calculate the area beneath a normal curve for a range of values. Here, your two Z scores are -1.21 and .84. You might notice that this table doesn't account for negative values, but the cool thing about a normal distribution is that we can assume symmetry, so you can just look for 1.21 and call it good. The actual calculation here is:
1 - Z-score of 1.21 - Z-score .84 ... use the table or calculator
1 - .1131 - .2005 = .6864
Because this table calculates areas to the RIGHT of the mean, you have to play around with it a little to get the bit in the middle that your graph asks for. You subtract from 1 to make sure you're getting the area in the middle and not the area of the tails in this problem.
Pretty simple, really - all you have to do us divide 509 by 14 before you're left with an answer of <span>36.35. Now, the number '36' is closer to 0 than 100, so we'll round down instead of up, therefore the number of floors to the building is 36! </span>