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
alina1380 [7]
3 years ago
13

A frog sits at one end of a table which is 2m long. In its first jump the frog goes a distance of 1m along the table, with its s

econd jump 1/2 m, with its third jump 1/4 m and so on. After how many jumps will the frog be within 1 cm of the far end of the table?
Mathematics
1 answer:
Phantasy [73]3 years ago
7 0
Ah, this is an infinite sum question, or a sum of geometric sequence
when will the sum reach 1cm of the edge or about 1.99m
so

2m=200cm
within 1cm means at least 1.99m
so
we will use m and not cm for consitancy

sum of geometric sequence is
S_n= \frac{a_1(1-r^n)}{1-r}
a1=first term=initial jjump=1
r=common ratio=1/2
n=?, we ar solving for that

so
we want it to equal 1.99 so

1.99= \frac{1(1- (\frac{1}{2})^n)}{1-\frac{1}{2}}
1.99= \frac{(1- (\frac{1}{2})^n)}{\frac{1}{2}}
1.99= 2(1- (\frac{1}{2})^n)
divide both sides by 2
\frac{1.99}{2} = 1- (\frac{1}{2})^n
times -1
\frac{-1.99}{2} = (\frac{1}{2})^n-1
add 1 or 2/2 to both sides
\frac{0.01}{2} = (\frac{1}{2})^n
take the ln of both sides
ln(\frac{0.01}{2}) = ln((\frac{1}{2})^n)
ln(\frac{0.01}{2}) = n ln(\frac{1}{2})
divide both sides by ln(1/2)
\frac{ln(\frac{0.01}{2})}{ln(\frac{1}{2})} =n
use your calculatro to find that n≈7.64386
so on 7th jump, it is not yet at 1cm to the edge but at 8th jump, it is past
so 8th jump
You might be interested in
Where is the hundred thousand place
ozzi
The 6th to the left

4 0
2 years ago
Last year, there were 148 pies baked for the bake sale. This year, there were c pies baked. Using c, write an expression for the
solniwko [45]

\huge{\boxed{c+148}}

We need to find the number of pies baked in years 1 and 2.

There were 148 pies baked in year 1. 148

There were c pies baked in year 2. 148+c

Rearrange the terms so the variable is first. c+148

5 0
3 years ago
Read 2 more answers
What is the measure of EAB in circle F?<br> 72°<br> 92°<br> 148°<br> 200°
Arada [10]

We have been given a diagram. We are asked find the measure of arc EAB.

First of all, we will find the measure of arcs ED and CB using our given information.

We know that measure of an inscribed angle is half the measure of intercepted arc.

We can see that angle EBC is inscribed angle of arc EDC, so measure of arc EDC will be twice the measure of angle EBC.

\widehat{EDC}=2\times m\angle EBC

\widehat{EDC}=2\times 80^{\circ}

\widehat{EDC}=160^{\circ}

Similarly, we will find the measure of arc DCB.

\widehat{DCB}=2\times m\angle DEB

\widehat{DCB}=2\times 70^{\circ}

\widehat{DCB}=140^{\circ}

\widehat{ED}=\widehat{EDC}-\wdiehat{DC}

\widehat{ED}=160^{\circ}-88^{\circ}

\widehat{ED}=72^{\circ}

\widehat{ED}+\widehat{DCB}+\widehat{EAB}=360^{\circ}

72^{\circ}+140^{\circ}+\widehat{EAB}=360^{\circ}

212^{\circ}+\widehat{EAB}=360^{\circ}

\widehat{EAB}=360^{\circ}-212^{\circ}

\widehat{EAB}=148^{\circ}

Therefore, the measure of arc EAB is 148 degrees and option C is the correct choice.

8 0
3 years ago
Read 2 more answers
Please help solve with steps
serg [7]

Answer:

6 6/11, 6.547, 131/20, 6.77.

Step-by-step explanation:

First convert to decimal values.

131/20 = 6.55

6.77

6 6/11 = 6.54545

6.547

7 0
3 years ago
The quadratic function y = –10x2 + 160x – 430 models a store’s daily profit (y) for selling a T-shirt priced at x dollars. What
asambeis [7]

Answer:

x = 4 or x = 12

Step-by-step explanation:

Given:

y = -10x² + 160x - 430

When y = $50

50 = -10x² + 160x - 430

50 + 430 = -10x² + 160x

480 = -10x² + 160x

-10x² + 160x - 480 = 0

Divide through by -10

x² - 16x + 48 = 0

Solve the quadratic equation using factorization method

+48 = -12 × -4

-16 = -12 -4

Therefore,

-12 and -4 are both factors

x² - 16x + 48 = 0

(x - 4 )(x - 12 ) = 0

x - 4 = 0

x = 4

OR

x - 12 = 0

x = 12

6 0
3 years ago
Other questions:
  • Write an equation of a line through (2,7.5) with an x-intercept of -1
    6·1 answer
  • some kangaroos can jump over 30 feet in one jump! if a kangaroo could jump like that 150 times in the row, how much farther woul
    9·1 answer
  • What is the greatest common factor of 12t3+30t2+48t
    10·1 answer
  • What is the difference in a length between a 1 1/4 and a 3/4 inch button
    10·1 answer
  • Help please :(((!!!!!!!!!
    6·2 answers
  • A cedar board is 2 inches long and 8 feet long. You will need to cut down the length of the board into 1 1/3 inches long. How ma
    14·1 answer
  • 3a+7+2(3+a) simpilify
    13·1 answer
  • 2p2 -15p + 25 =<br><br> (p - 5)(2p - 5)<br> (p - 5)(2p + 5)<br> (p + 5)(2p - 5)<br> (2p - 15)(p + 5)
    7·2 answers
  • Give an ordered pair on the graph and explain it’s meaning in the real world context.
    11·1 answer
  • What is the surface area of the following figure?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!