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
Wewaii [24]
3 years ago
5

Can you please help me with my question​

Mathematics
1 answer:
Reika [66]3 years ago
4 0
The answer:
First: sec(-pi) is sec(pi)
And sec(pi) is -1
You might be interested in
PLEASE HELP ME WITH THIS I WILL GIVE BRAINLIEST
goldenfox [79]
A because a colored circle means it’s greater than
7 0
3 years ago
Solve for X when the surface area is 298ft^2
jok3333 [9.3K]

Step-by-step explanation:

Total surface area of cuboid= 2(lb+bh+hl)

= 298ft²=2(28+4x+7x)

= 149=28+11x

= 121=11x

= 11=x

6 0
2 years ago
A worker was paid a salary of $10,500 in 1985. Each year, a salary increase of 6% of the previous year's salary was awarded. How
Mazyrski [523]
Note that 6% converted to a decimal number is 6/100=0.06. Also note that 6% of a certain quantity x is 0.06x.

Here is how much the worker earned each year:


In the year 1985 the worker earned <span>$10,500. 

</span>In the year 1986 the worker earned $10,500 + 0.06($10,500). Factorizing $10,500, we can write this sum as:

                                            $10,500(1+0.06).



In the year 1987 the worker earned

$10,500(1+0.06) + 0.06[$10,500(1+0.06)].

Now we can factorize $10,500(1+0.06) and write the earnings as:

$10,500(1+0.06) [1+0.06]=$10,500(1.06)^2.


Similarly we can check that in the year 1987 the worker earned $10,500(1.06)^3, which makes the pattern clear. 


We can count that from the year 1985 to 1987 we had 2+1 salaries, so from 1985 to 2010 there are 2010-1985+1=26 salaries. This means that the total paid salaries are:

10,500+10,500(1.06)^1+10,500(1.06)^2+10,500(1.06)^3...10,500(1.06)^{26}.

Factorizing, we have

=10,500[1+1.06+(1.06)^2+(1.06)^3+...+(1.06)^{26}]=10,500\cdot[1+1.06+(1.06)^2+(1.06)^3+...+(1.06)^{26}]

We recognize the sum as the geometric sum with first term 1 and common ratio 1.06, applying the formula

\sum_{i=1}^{n} a_i= a(\frac{1-r^n}{1-r}) (where a is the first term and r is the common ratio) we have:

\sum_{i=1}^{26} a_i= 1(\frac{1-(1.06)^{26}}{1-1.06})= \frac{1-4.55}{-0.06}= 59.17.



Finally, multiplying 10,500 by 59.17 we have 621.285 ($).


The answer we found is very close to D. The difference can be explained by the accuracy of the values used in calculation, most important, in calculating (1.06)^{26}.


Answer: D



4 0
3 years ago
Answer these questions please please
Natalka [10]

Answer:

Step-by-step

i) a² - 2ab + b² = (a + b)²

a² = p² ;     a  = p

b² = 16 = 4²  ;        b = 4

2ab = 2*p*4 = 8p

p² - 8p + 16 = (p - 4)²

ii) a² + 2ab + b² = (a +b)²

a² = 121x² = (11x)²                 ;  b² = 4y² = (2y)²

2ab = 2 * 11x * 2y = 44xy

121x² + 44xy + 4y² = (11x + 2y)²

4 0
3 years ago
4.
matrenka [14]

Answer:

Step-by-step explanation:

D.works many year for a nation

8 0
3 years ago
Other questions:
  • Solve for y 3x + 1/5y = 7
    13·1 answer
  • Need this ASAP! <br> Find the value of x.
    7·1 answer
  • Kiera baked 30 Oatmeal cookies and 48 chocolate chip cookies to package in plastic containers for her teacher friends at school.
    15·1 answer
  • The stairs leading from the ground to the entrance of a plane forms a right triangle with the ground. If the dis
    8·2 answers
  • Alyssa is 10 and her grandma is 71. Alyssa created a family tree in 2001, in what year was grandma born
    14·1 answer
  • The altitude of an equilateral triangle is 7 units long. The length of one side of the triangle is ____ units.
    13·2 answers
  • Simplify 4(2x^3y^4)^4/2(2x^2y^6)^3. Show your work. Please help ASAP!!
    6·1 answer
  • A whale was diving at a rate of 2 meters per second. how long will it take for the whale to get to from the surface of the ocean
    5·1 answer
  • What is the approximate volume of a half sphere with a diameter of 8 cm?
    10·1 answer
  • Solve for b and c. Select BOTH correct answers.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!