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1. 

On August 17, 1983, an earthquake with a magnitude of 5.3 In the Richter scale hit the province of llocos Norte. This was the most sever earthquake in North - western Luzon in 52 years and probably the second largest earthquake to hit Laoag City and its Immediate vicinity In historical times (Source: phivocs.dost gov.ph). How much energy was released by the earthquake?Question 10 A laboratory test confirms that 9 milligrams of a particular radioactive substance decreases to 7 miligrams in 20 seconds. Determine the half-life of the substance.Question 2 Ithan invested 500 php in a savings account that ears 3.5%% Interest rate. If the account has no withdrawals. how much money will jhan have at the end of 1 and a half years?Question 3 Suppose money is deposited In a certain bank doubles every 10 years, If the bank compounds interest continuously, what annual interest rate does the bank offer?Question 4 Currently, Toyota Alphard costs 3.91 million php. Dr. Ramos wishes to purchase a unit and the car dealer offers 2.5% interest. compounded quarterly payable in three years and no downpayment is required. How much would each payment be?Question S An Investment grew to 20,500 php In 2 years, and 21,700 php In 3 years. Find the principal amount of the Investment.Question 6 Thomas received 50,000 php from his parents during his 33rd birthday. He inwested his money In a scheme wherein he will receive 10 equal payments at the end of every year starting 30 years from now, with an interest rate of 3%% compounded annualy. How much is the regular pay-out Thomas will receive annualy from this investment?Question 7 Mr. Raymundo wants to purchase a house and lot In Banton, Rombion for 1.500,000 php. Bank of Aduns has approved his loan application for a 15 - year fixed - rate loan at 10% annual interest. He makes a 20%% downpayment In this housing loan. How much is the amount of the interest paid for the first term of amortization?Question 8 Racho Labs Inc. obtains a loan of 1,500,000 php, with 8% Interest rate compounded quarterly, for the construction of a new clinic in Bohol. The owner wil repay the loan by payments made quarterly for 10 years. How much is the quarterly payment that the owner should pay?Question 9 If 1,000.000 php is invested at 8%% compounded quarterly, how many years will the Investment grow to reach 1.300.000 php