1. If y varies inversely as x and y = 25 when x = 2, find y when x = 5.
2. Find sin 54° to the nearest thousandth.
3. Use I = Prt to find r if I = $370, P = $2000, and t = 3 years.
2007-06-11 09:21:16 · 12 answers · asked by Kel 1 in Science & Mathematics ➔ Mathematics
1. If y varies inversely as x and y = 25 when x = 2, find y when x = 5.
So y = k/x, where k is a constant.
25 = k/2, so k = 50.
So equation is y = 50 /x, so y = 10 when x =5.
2. Find sin 54° to the nearest thousandth.
= .809 to nearest thousandth using calculator.
If you are not to use a calculator, then you would have to use an infinite series to get answer.
3. Use I = Prt to find r if I = $370, P = $2000, and t = 3 years
r = i/(Pt) = 370/(2000*3) = .061666 = 6.17 %.
2007-06-11 09:43:49 · answer #1 · answered by ironduke8159 7 · 0⤊ 0⤋
1) If x goes up from 2 to 5, then y will go down by a factor of 2/5. 25 * 2/5 = 10
2) From excel .809 to the nearest thousandth
3) r = I/(Pt) = 370/(2000*3) = 370/6000 = 37/600 = .061666....
or 6 and 1/6 percent.
2007-06-11 16:29:37 · answer #2 · answered by tbolling2 4 · 0⤊ 1⤋
1) If x + y = 27 and they vary inversely, if could be argued that when x = 5 then y must equal 22.
2) According to my calculator, the sin of 54 is 0.809016994 so to the thousandth it would be 0.809.
3) if 370 = (2000) * (r) * (3 yrs) then the rate = 6.1667%, assuming no compounding of interest.
2007-06-11 16:29:19 · answer #3 · answered by Motown Robert 2 · 0⤊ 1⤋
1. y=k/x => 25=k/2 => k=50
So y=50/x => y=50/5 = 10
2. sin54 = 0.809 (to the nearest thousandth)
3.
I = Prt
370 = 2000(r)(3)
r = 0.0617 or 6.17%
2007-06-11 16:25:31 · answer #4 · answered by Kemmy 6 · 0⤊ 1⤋
the first one, not sure the equation. I will write out equation.
2. 0.809 (or 0.809016994) just pick to thousandth (10^-3)
3. $370 = 2000*3*(1/100) where i=% (1/100)
i ~6.1667%
If your #3 has different setup (compound interest) it may be different answer.
2007-06-11 16:31:41 · answer #5 · answered by Mo N 4 · 0⤊ 1⤋
1. y=62.5
2. check the back of ur geo book it should show you the table with the answer
3. ur lazy that is soo easy and i'm 15, figure it out urselfjust plug in the info to the formula
2007-06-11 16:25:55 · answer #6 · answered by um no 3 · 0⤊ 1⤋
HI, what grade are you in? I'm in 7th...and I think the answer to number one is 62.5. But I don't know, good luck;math is hard!
2007-06-11 16:26:29 · answer #7 · answered by me. 2 · 0⤊ 1⤋
You really need to do your own math if you wanna learn. your math book should explain how to do this at the beginning of the chapter.
2007-06-11 16:25:39 · answer #8 · answered by slgtaz 2 · 0⤊ 1⤋
1. k =50 so y = 10
2. .809
3. .06166 --> 6.17 %
2007-06-11 16:25:28 · answer #9 · answered by shopisotonix11 3 · 0⤊ 0⤋
5=62.5
2007-06-11 16:27:14 · answer #10 · answered by smallfrie 2 · 0⤊ 1⤋