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
Vesnalui [34]
3 years ago
8

Find the sum of the first 8 terms of the sequence an=2(4) ^n-1

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
7 0

Answer:

Step-by-step explanation:

a1=2

r=4

n=8

s_{8}=2\frac{4^8-1}{4-1} =\frac{2}{3} (4^8-1)=\frac{2}{3} (65536-1)=\frac{2}{3} (65535)=2 \times 21845=43690

You might be interested in
A box office sold 147,523 tickets for an auto race.
Marysya12 [62]

Answer:

78,799 children's tickets

Step-by-step explanation:

147,523 total tickets, 68,724 adult tickets

Subtract to find amount of children's tickets:

147,523-68,724 = 78,799

5 0
3 years ago
A softball base is 15 x 15 inches long and wide. What is the length of the diagonal?
Finger [1]

Answer:

15 sqrt 2

Step-by-step explanation:

Use Pythagorean Theorem

a^2 + b^2 = c^2

15^2 + 15^2 = c^2

225 + 225 = 450

Find prime factors of the sq rt of 450

450 = 2 * 3 * 3 * 5 * 5

15 sqrt 2

4 0
2 years ago
Find the slope of the curve r=cos(2theta) at theta=pi/6.. . Must this be solved parametrically? If so, why?
lara31 [8.8K]

By converting into parametric equations,

<span><span>x(θ)=r(θ)cosθ=cos2θ<span>cosθ
</span></span><span>y(θ)=r(θ)sinθ=cos2θsinθ</span></span>

By Product Rule,

<span>x'(θ)=−sin2θcosθ−cos2θsinθ</span>

<span>x'<span>(π/2)</span>=−<span>sin(π)</span><span>cos<span>(π/2)</span></span>−<span>cos(π)</span><span>sin<span>(π/2)</span></span>=1</span>

<span>y'(θ)=−sin2θsinθ+cos2θcosθ</span>

<span>y'<span>(π/2)</span>=−<span>sin(π)</span><span>sin<span>(π/2)</span></span>+<span>cos(π)</span><span>cos<span>(π/2)</span></span>=0</span>

So, the slope m of the curve can be found by

<span>m=<span>dy/dx</span><span>∣<span>θ=<span>π2
</span></span></span>= <span><span>y'<span>(π/2)/</span></span><span>x'<span>(π/2)
</span></span></span></span>=0/1

=0

I hope my answer has come to your help. Thank you for posting your question here in Brainly.

6 0
3 years ago
K/9=3/9=what ? so is( k)a 3 or another number which is k=3/9=3/9 or no?
Flura [38]
So, if k/9=3/9, then k=3, because it is a variable substituting 3. :D Hope I could help! 
3 0
3 years ago
WILL MARK BRAINLIEST PLEASE HELP!!!!!!!!!!!!!!!!!!
defon

Answer

Step-by-step explanation:

I am not an artist so

8 0
3 years ago
Other questions:
  • If the side length of the base of a square pyramid is divided by 4 and the slant height is divided by 3, what is the surface are
    11·1 answer
  • a scale drawing of a building needs to be made using the scale 1 in=170 ft.how tall will the building in the scale be if the bui
    5·1 answer
  • From 2003 to 2004 the number of students in a school DECLINED by 140 students
    11·1 answer
  • Apply the distributive property and the greatest common factor to write an equivalent expression.
    8·2 answers
  • Find the value of 15.0 NN in pounds. Use the conversions 1slug=14.59kg1slug=14.59kg and 1ft=0.3048m1ft=0.3048m.
    9·1 answer
  • HELPPPPP PLEASEEEE!!!!!
    15·1 answer
  • Please answer this correctly without making mistakes
    13·2 answers
  • 4
    11·1 answer
  • HELP PLZ ILL MAKE BRAINLIEST AND GIVE ALOT OF POINTS-
    10·2 answers
  • Please help geometry question
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!