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Mathematics 10 Online
OpenStudy (anonymous):

Myra’s stamp collection consisted of 120 stamps in October. In March, her collection grew to 138 stamps. Find the percent increase between October and March. (Points : 1) 15% 9% 18% 12%

OpenStudy (anonymous):

@JReed231

OpenStudy (anonymous):

15%

OpenStudy (anonymous):

15%

OpenStudy (anonymous):

thanks

OpenStudy (anonymous):

The cost per minute for a conference phone call, originally $3.20, increased by 40%. What is the new price? (Points : 1) $4.58 $4.48 $3.60 $3.32

OpenStudy (anonymous):

4.48 or 3.32

OpenStudy (anonymous):

okay

OpenStudy (anonymous):

let the new price be n. so as per info 40% rise means new price =(140)% of Old price or, n =140*3.2/100 or,n=$4.48

OpenStudy (anonymous):

yea i say 4.48

OpenStudy (anonymous):

Fred buys several shares of stock at $24 per share and sells them at $21.12 per share. What is the percent of decrease in the price of the stock? (Points : 1) 12.0% 11.5% 11.0% 10.5%

OpenStudy (anonymous):

12%

OpenStudy (anonymous):

thanks

OpenStudy (anonymous):

Hannah earned $1536 in 8 years on an investment at a 4% simple interest rate. How much was Hannah’s investment? (Points : 1) $491.52 $4800 $3072 $768

OpenStudy (anonymous):

She earns 4% simple interest each year. That's 32% after 8 years. Hannah started with $4800.

OpenStudy (anonymous):

So wut i did was i mulitiplied 1536 times 8 and got 12288 then i divided by thatt and got C. 3072

OpenStudy (anonymous):

thanks im going with 4800

OpenStudy (anonymous):

Find the annual interest rate if a $7000 investment earns $840 annual simple interest in one year. (Points : 1) 12% 12.5% 13% 13.5%

OpenStudy (anonymous):

12

OpenStudy (anonymous):

12%

OpenStudy (anonymous):

thanks

OpenStudy (anonymous):

anytime

OpenStudy (anonymous):

np

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