A goblin miner earns 1 cent the first day, 2 cents the second day, 4 cents the third day, 8 cents the fourth day. How much will the miner earn in 30 days?
OkI know to double the answer each time until 30which would be:5,368,709.12
Is there an equation to make this easier?
Thanks
Sort of. Notice that on the nth day, the amount of money that day is 2^(n1 ) Then notice the amount of money made to date (look at the above figures) is 2^(n1) 1.
So the total the miner earns in thirty days...
2^29 + 2^29 1= 2^30 1 cents.
check that for n= 4, and n=5
Thank you!
 👍
 👎
 👁
 ℹ️
 🚩
Answer this Question
Related Questions

Maths
We have Rs.100/.If we spend Rs.100/and balance is Rs.102/,show how is Rs.2/extra Spent Balance Day 1 Rs 40 Rs 60 Day 2 Rs 30 Rs 30 Day 3 Rs 18 Rs 12 Day 4 Rs 12 Rs 00   Total Rs 100 Rs102......?

Probability
Oscar has lost his dog in either forest A (with probability 0.4) or in forest B (with probability 0.6). If the dog is in forest A and Oscar spends a day searching for it in forest A, the conditional probability that he will find the dog that day is 0.25.

algebra 1A
a family travels to Bryce Canyon for three days. on the first day, they drive 150 miles. on the second day, they drive 190 miles. what is the least number of miles they drove on the third day if their average number of miles per day was at least 180?

calculus
a rectangular box is to have a square base and a volume of 20 ft cubic if the material for the base costs 30 cent per square foot, the material for the sides cost 10 cent per sqaure foot, and the material for the top costs 20 cents per square foot,

riddle
What two coins will make up 30 cents but you cannot use a nickel ? What two coins will make up 30 cents but you cannot use a nickel ? The way you phrased the question, there is no answer. The usual way the problem is worded is, "What two coins total 30

Math
One year the postage rate for sending 1 ounce of mail first class was increased from 25 cents to 29 cents. The percent of increase in the 29 cent postage rate was most nearly?

Math
a photocopy store advertises the following prices: 5 cents per copy for the first 20 copies, 4 cents per copy for the 21st through 100th copy, and 3 cents per copy after the 100th copy. Let x be the # of copies, and let y = the total cost of the

Algebra
1.) An art gallery owner is framing a painting. The width of the painting to be displayed is 30 inches. He wants the width of the frames oainting to be 381/2 inches.How wide should each section of the frame be? 2.) Ace Truck Rental charges $54 a day plus 9

math
each day Ashley practices free throws. The first day she takes 12 shots, and every day after she takes 2 more than the previous day. How many free throws will she shoot on the 6th day. Thank you. =)

Math
Mute Cycled To Raise Funds For A Charitable Organisation.On The First Day,he Cycled 40km.For The First 10 Days.He Cycled 3km Less On Each Subsequent Day.Theafter,he Cycled 2km Less On Each Subsquent Day .(A)Find Distance Cycled On The Tenth Day,(b)distance

ALGEBRA
Mae open her coin purse and found pennies,nickels and dimes with a total value of $2.85.If there are twice as many pennies as there are nickels and dimes combined.How many pennies,dimes and nickels are there if she has a collection of 90 coins given:

college algebra
Deshaun is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A has no initial fee but charges .70 cents for every mile driven. Company B charges an initial fee of $50 and an

Math
You have a Spanish club meeting every fourth day and a math club meeting every tenth day. When is the first time they will meet on the same day? My Answer: 4 + 10=14 they would meet on the 14th day Would that be the correct answer? I am confused.

Arithmetic
If pencils are bought at 70 cents per dozen and sold at 3 for 20 cents, the total profit on 6 dozen is?

College Math
James bought 24 bolts at the hardware store for a total of $9.00. Some were 3−inch bolts that cost 36 cents each and the others were 4−inch bolts that cost 42 cents each. How many 3−inch bolts did James buy?

Math
David had d dollars. After a shopping trip, he returned with c cents.how many cents did he spend?

Mathematics
David had d dollar. After a shopping trip,he returned with c cents. How many cents did he spend?

calc
Modeling Cost An electricity company charges its customers a base rate of $10 a month, plus 6 cents per kilowatthour (kWh) for the first 1200 kWh and 7 cents per kWh for all usage over 1200 kWh. For example, if a customer uses 1400 kWh in a month, they

math
A bit is one eighth of a dollar how many cents is 6 bits? My answer is 6 cents? I don't think I am right.

Math
The charges for hiring a car from three different companies, based on the number of days for which a car is hired and/or the number of kilometres for which the car is driven are as follows: Company A charges $660 per day Company B charges 48 cents on per
Still need help?
You can ask a new question or browse existing questions.