1.)if a notebook cost 5.25 how much is the cost of 6 notebooks?

2.) a working student earns 25.50 per hour how much does he earn in 4 hours? if he works three days a week how much does he earn in a week?

3.) mr de guzman class traveled 3.8 miles to the first observatory the next closet observatory is 13 times far. how far is the second observatory?

4.) a chocolate bar weighs 8.7 grams find the cost and the weight of 115 chocolate bars if each part costs 30.2.?

5.) a kg of beef cost one 80.90 how much do 95 kg of beef cost?​