Add all the times together:
10 + 25 + 15 = 50 minutes total.
For the ratio divide the time for weights by total time:
25/50 which reduces to 1/2
The ratio is 1/2
Answer: 
Step-by-step explanation:
You need to remember the Product of powers property:

Then, knowing this property, now you have to apply the Distributive property. So:

Finally, to simplify this expression, you need to add the like terms.
Therefore, you get that the product is:

Answer: 945
Step-by-step explanation:
this month = 450.
next month 450x10/100=45, 450+45= 495
450+495= 945
70,000 grams is 70 kilograms