It’s the last option if you need an explanation just let me know!
Cosecant of 630 degrees is 0
If he saves $ 8 each week...and his mom is giving him 0.25 for each dollar, then he will have (8 + 0.25(8)) = 8 + 2 = $ 10 per week
10w = 100.....with w being the number of weeks
w = 100/10
w = 10...so he will have it in 10 weeks <==
Let the required length be x, then
x/25 = 6/(6 + 9)
x/25 = 6/15
15x = 25 x 6
x = 150/15
x = 10
Therefore, the short brace should touch the brace at 10 feet.
