Wednesday

November 26, 2014

November 26, 2014

Posted by **Nancy** on Monday, January 5, 2009 at 11:43pm.

Could someone explain to me how to solve this? Which geometric formula would I have to use?

- Gr.11 Math -
**bobpursley**, Tuesday, January 6, 2009 at 12:01amTHE first layer 5

second layer 5x3

third layer 5x3x3

see the pattern?5*3^(n-1)

where n is the layer.

employees total is the sum of all of these. Looks like a geometric series..

- Gr.11 Math -
**Reiny**, Tuesday, January 6, 2009 at 12:04amIf you call the five senior managers as the first level, then in the second level there would be 15 and in the third level there would be 45

so you want the 7th term in this sequence, not the sum of 7 terms (because you would be counting the same people again and again)

so a=5, r=3, and t(7) = ar^6 = 5(3)^6 = 3645

check my arithmetic.

- Gr.11 Math -
**Mae**, Tuesday, January 6, 2009 at 12:05amUse the formula

Sn = a(r^n-1)

--------

r-1

**Answer this Question**

**Related Questions**

Math (Functions) - A large company has a phone tree to contact its employees in ...

Math (Functions) - A large company has a phone tree to contact its employees in ...

math - Hadley's softball team has a phone tree in case a game is cancelled.The ...

Algebra - ABC phone company charges $18 per month plus 7 cents per minute of ...

Algebra - ABC phone company charges $16 per month plus 8¢ per minute of phone ...

Algebra - ABC phone company charges $16 per month plus 8¢ per minute of phone ...

Pre Algebra - A phone company charges $27.95 monthly fee and .12/min. for local ...

math - A company published its list of employees and their salaries (rounded off...

statistics - In a local cellular phone area, company A accounts for 70% of the ...

Math - Your phone company charges $0.05 per minute for long distance phone calls...