1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
inessss [21]
3 years ago
11

If a person puts 1 cent in a piggy bank on the first day, 2 cents on the second day, 3 cents on the third day, and so forth, how

much money will be in the bank after 40 days? $8.20 $16.40 $0.40 $4.10
Mathematics
1 answer:
cluponka [151]3 years ago
4 0
This is an arithmetic sequence with the common difference being 1

and if u have 1 cent on day 1 and 2 cents on day 2....then on day 40, u would have 40 cents....but we need the sum of all the days..

the sum of an arithmetic sequence can be found using the formula :
sn = n(a1 + an) / 2
n = number of terms = 40
a1 = first term = 1
an = last term = 40

now we sub
s(40) = 40(1 + 40) / 2
s(40) = 40(41)/2
s(40) = 1640/2
s(40) = 820.....820 cents = $ 8.20 <== the sum
You might be interested in
Clayton biked 3/8 of the 14.5 miles between his house and the beach.How many miles does he still need to bike before he reaches
Gekata [30.6K]
Explanation: Given: Clayton bikes 3/8<span> of </span>14.5 miles<span>. </span>38⋅14.5<span>1=43.58=5.4375 </span>miles biked<span>. Left to </span>bike<span> to </span>beach<span>: 14.4−5.4375=9.0625 </span>miles<span>. OR. </span>38 biked<span>, means 58 left to </span>bike: 58⋅14.5<span>1=72.58=9.0625 </span>miles<span>. Was this helpful? </span>
4 0
3 years ago
Read 2 more answers
I need help finding the answer!!
Whitepunk [10]

Answer:

The second option

Step-by-step explanation:

Here, we need to multiply each part of the matrix by -10.

This will give us: [ -230 380 ]

                           [ -170    60 ]

So, the answer is the second option.

3 0
2 years ago
Which graph represents the solution to the system of inequalities?
Gre4nikov [31]

IDK sorry I'm really sorry

7 0
3 years ago
Read 2 more answers
What is the ratio 44/12 in simplest form
sladkih [1.3K]

Answer:

44/12 = 11/3 =  3   2/3

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Please help asap will give 20 pts, brain, 5 star and thanks [must include sbs]
stiks02 [169]
61+58=119
180-119=61=angle 2
180-61=119=angle 4
6 0
2 years ago
Read 2 more answers
Other questions:
  • Breanna has quarters, dimes, and nickels in her purse. she has 3 fewer nickles than dimes, but she has 2 more nickles than quart
    13·2 answers
  • Please help me
    12·1 answer
  • Solve the equation 4s=112
    12·2 answers
  • Quadrilateral ABCD is similiar to quadrilateral EFGH. The lengths of the three longest sides in quadrilateral ABCD are 24 feet,
    15·1 answer
  • Is 9x^2 - 12x + 4 a perfect square? Why?
    6·2 answers
  • I need a littile helpppppppppppppp
    15·2 answers
  • Which is equivalent to the expression (2x+4)(x-6)?
    8·1 answer
  • Select the correct answer.<br> For which pair of matrices is ?
    6·2 answers
  • Problema 6 Descompongan los siguientes números en factores primos. ¿Es posible encontrar, para cada número, más de una descompos
    11·1 answer
  • HELP PLS I'LL MARK YOU BRAINLIST
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!