Calculator questions

[RobinK]

Calculate p given that [unparseable or potentially dangerous latex formula] = 263, C = [unparseable or potentially dangerous latex formula] and D = [unparseable or potentially dangerous latex formula] and B = CD.

Like I don't understand what [unparseable or potentially dangerous latex formula] is.

Sweet Adelines, a female barbershop singing organization, grew from 1500 members in 1949 to 30,000 in 2007. What was the average annual growth in membership?

A 2-layer cake is 9 inches across, and 4 cups of flour were used. How far across is a 3-layer cake made using 7 cups of flour if the layers are geometrically similar?

An algae population was initially 1000 algae, and it doubled every 3 days. What was the growth rate after 6 weeks?

What is the area under the curve y = [unparseable or potentially dangerous latex formula] between x = 0 and x = 1.5?

Any tips on how to do number crunchers faster? I'm stuck at about 11 and a half minutes. Thanks.

[101dalmatians]

[101dalmatians]

[101dalmatians]

[Shawn]

Please post the answers.
Barbershop Question
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
Annual Growth is this amount minus 1 times 100
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[Shawn]

Scaling Cake Problem:
The problem is scaling. I am going to assume the thickness of the layers are constant. If they are not scale them as well.
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

[Shawn]

Algae Problem:
What is growth rate? How many times it multiplied or a percentage? I will respond later on this one.
Number Crunchers Quickly:
Use a calculator and entry system that facilitates quick and accurate entry? Practice should make you faster if you are using a HP already.

[RobinK]

4, 5.30, 9.47, 2630, 0.533

The answer for the algae one is in algae/min. Thanks.

[101dalmatians]

[sxk1693]

You need to differentiate APERT.

[unparseable or potentially dangerous latex formula] where A is the amount of algae remaining after t minutes. r is the rate of growth. P is the initial amount, so
[unparseable or potentially dangerous latex formula] You know that the population of algae doubles after 3 days or 4320 minutes:

[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]

SO, after simplifying APERT (which I can't seem to do because latex is being stupid again)
You get,

[unparseable or potentially dangerous latex formula]


Now just differentiate this

[unparseable or potentially dangerous latex formula]

Now evaluate dA/dt 6 weeks or 60480 minutes:

[unparseable or potentially dangerous latex formula]

[sxk1693]

[sxk1693]

I know this looks time consuming, but its really fast after doing these types of problems over and over again(like I have)

The hard part is realizing what to do.

[101dalmatians]

coOl :O

[101dalmatians]

ok and in my scaling, the latex should be actually like (6/7)^(1/3)
somehow these computers dont get my code...

[nsguy1350]

[101dalmatians]

WoW :W