Not sure about the others but
b) 8,192
the pattern is multiplying by 8 each time for b
I'm guessing the % of syrup refers to the % of sugar it has, therefore:
75% = 75 / 100 = 0.75
0.75 * x = 0.5
x = 0.5/0.75
x = 0.66
She will have 0.66 lbs of syrup
Without solving:
1. Infinitely many solutions
2. No solution
Hope this helps!
Sum of consecutive integers = n*(n+1) / 2
2,323 = (n^2 +n)/2
4,646 = n^2 + n
n^2 + n -4,646 =0
n = 67.663 which is NOT an integer
Do you have the problem typed correctly?