All categories

3 years ago

Can someone help me with this

Mathematics

1 answer:

CaHeK987 [17]3 years ago

5 0

Answer:

19 m

Step-by-step explanation:

This is Geometric progression with

$\left \{ {{u_1=1,\: u_2 =2} \atop {u_n=2^{n-1}u_1} \right.$

Then the fomular of sum is

$S=u_1\frac{2^n-1}{2-1} =1\times(2^n-1)=2^n-1\\To\: save\: 1 \:million\: then \; our \:sum \: will \: be\: 1000000\\Hence,\\2^n-1=1000000\\2^n=1000001\\n=log_{2}{1000001}\approx19,9\\Thus, it\:would \;be \:19 \:months \:before\: we\: saved \:1000000 \:pounds$

You might be interested in

Solve the following system of equations 2x+y=11 and -x+2y=2

givi [52]

{2x+y=11
{-x+2y=2 //*2

{2x+y=11
+
{-2x+4y=4

5y=15
y=3
-x+6=2
x=4
Answer
x=4; y=3

7 0

3 years ago

if a line with an angle of inclination 120⁰ and passes trough (√3,1),then what is the equation of a line

yawa3891 [41]

Answer:

The equation of a line, having inclination 120° with positive direction of x-axis, .of x-axis, which is at a distance of 3 units from the origin is. 1. See answer ... where α is the angle with the positive X-axis, made by the perpendicular line drawn Now, from equation the equation of the straight line will be.

Step-by-step explanation:

5 0

3 years ago

A, b and c are the sides of a right triangle, where side a is across from angle a, side b is across from angle b, and side c is

Vera_Pavlovna [14]

Find missing length :

a² + b² = c²
c² = 19² + 34²
c² = 1517
c = √1517
c = 38.95 units.

Find missing angle A:

$\dfrac{a}{\sin(a)} = \dfrac{c}{\sin(c)}$

$\dfrac{19}{\sin(a)} = \dfrac{38.95}{\sin(90)}$

$\sin(a) = 0.488$

$a = sin^{-1} (0.488)$

$a = 29.2 \textdegree$

Find Missing B:

$\dfrac{b}{\sin(b)} = \dfrac{c}{\sin(c)}$

$\dfrac{34}{\sin(b)} = \dfrac{38.95}{\sin(90)}$

$\sin(b) = 0.873$

$b = sin^{-1}(0.873)$

$b = 60.8 \textdegree$

Answer: Missing length = 38.95 units ; Missing angles = 29.2° and 60.8°

8 0

3 years ago

-3.75+2(-4x+6.1)-3.25

Pani-rosa [81]

The value of x is 0.65

Step-by-step explanation:

This solution is given by solving the given problem using BODMAS rule.

This means that the steps to be followed to find the solution should be in the order of BODMAS rule.

B- Bracket, O- of, D- Division, M- Multiplication, A- Addition, S- Subtraction.

This rule states that the 1st operation must be done for Brackets.

⇒ -3.75+2(-4x+6.1)-3.25 = 0

⇒ -3.75 -8x + 12.2 -3.25 = 0

The addition operation should be performed next and then followed by subtraction.

⇒ -8x -7+ 12.2 = 0

To find the value of x :

Keeping the x term alone on one side and moving the constants on other side,

⇒ -8x = -12.2 + 7

⇒ -8x = -5.2

⇒ x = 5.2/8

⇒ x = 0.65

3 0

3 years ago

W 5 − 7 w −10w 4 is a polynomial or not?

BabaBlast [244]

Answer:

That is a tri nomial, a basic level of polynomial

Step-by-step explanation:

A polynomial is an expression containing the algebraic sum of especial terms called monomial, which are variables with an exponent and a coefficient.

The degree of your polynomial is 5, the highest degree that is used by the variable,

3 0

3 years ago