can you check if i have right these word problems of finding product or quotient
1) the value of jims telphone calling card decreases 15 cents for every minute he uses it. yesterday he used the card to make a 6 minute call. How much did the value of the card change?
i got: it changed by : -.90 cents
-.15 x 6 = -90 cents
2) one day the temperature in long grove oklahoma fell 3 degrees per hour for 5 consective hours. give the total change in temperature.
i got: -15 degree total change
-3 x 5 = -15
3) the populaton of new orleans louisana decreased from about 558,00 in 1980 to 497,000 in 1990. on average about how much did the population change each year?
i got: population change each year by : 6100
i took 558,000 - 497,000 = 61,000 / 10 = 6100
are these 3 all correct?
1 and 2 are correct
in 3, since the population decreased, I would indicate that as -6100
ok thanks
Let's check your answers one by one:
1) For Jim's telephone calling card, the value decreases by 15 cents for every minute he uses it. Yesterday, he used it for 6 minutes. To calculate the change in the value of the card, you correctly multiplied -0.15 (representing a decrease of 15 cents) by 6, which gives you -0.90 or -90 cents. So, your answer is correct.
2) The temperature in Long Grove, Oklahoma fell 3 degrees per hour for 5 consecutive hours. To find the total change in temperature, you correctly multiplied -3 (representing the decrease of 3 degrees per hour) by 5, which gives you -15 degrees. So, your answer is correct.
3) The population of New Orleans, Louisiana decreased from about 558,000 in 1980 to 497,000 in 1990. To calculate the average change in population each year, you correctly subtracted 497,000 from 558,000, which gives you 61,000. However, to find the average change per year, you divided by the number of years (10), not 10. So, the correct answer should be 6100 people per year.
So, your answers for questions 1 and 2 are correct, but for question 3, the correct answer is 6100 people per year.