To try to solve it, I assume that the first three - symbols are dashes, not subtraction signs, because she is trying to generate a telephone number.
The cube root of 54,872,000 is 380.
That gives 1-650-380-....
In the last figure, if the parenthesized number is 112, the result is of course negative (-12,535), and x7/10 comes to -8774.5.
Does she want it rounded off/up to yield 1-650-380-8775 ?? If so, why did she make it negative? Or is the symbol before 7/10 actually a negative sign?
I think I need math help, and I don't want to call her. So I'll blog it...
Addendum: Reader Steve Blunk has already come up with an answer. That took all of ?what - 20 minutes? Here it is:
My take for the last grouping would be
7/10*(9-(11i)^2) =
7/10*(9-(11^2*i^2) =
And since i^2 = -1, the rest follows:
7/10*(9+11^2) =
7/10*130 = 91
but since four digits are required, I'd write it as 0091
So Paula's number is 1-650-380-0091
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