The sum of the two primes is 2001, and the product of the two primes is______ ．

The sum of the two primes is 2001, and the product of the two primes is______ ．

Because the sum of two prime numbers is odd, one prime number must be odd and the other even. Because 2 is the only even prime number, the other prime number is 1999, so their product is 2 × 1999 = 3998

The sum of two prime numbers is 1995. What is the product of these two prime numbers?

The sum of two prime numbers is 1995
Only 2 and 1993 fit
The product is 2 * 1993 = 3986

The quotient of a divided by B is 1.8, and the simplest integer ratio of a and B is ()

9:5

The height of a parallelogram is 4.3dm, the bottom is twice as high, and its area is [] square decimeter

Bottom = 4.3 × 2 = 8.6 decimeters
Area = 4.3 × 8.6 = 36.98 square decimeters

2.5 times of a number is exactly the quotient of 14 / 9 divided by 7 / 3. How to find this number

Let this number be X
2.5X=14/9*3/7
5/2x=2/3
x=4/15

How many square decimeters iron sheet does it need to make a cylindrical bucket with a height of 5 decimeters, a bottom area of 12.56 decimeters and a circumference of 12.56 decimeters? If the bucket is full of water, how many kilograms can it hold? 1 liter of water weighs 1kg

Radius = 12.56 △ 3.14 △ 2 = 2 decimeters
3.14 × 2 & # 178; + 2 × 3.14 × 2 × 5 = 75.36 square decimeters
At least 75.36 square decimeters of iron sheet is required
3.14 × 2 & # 178; × 5 = 62.8kg
The bucket is full of water and can hold 62.8kg

66.6666÷12.5÷3.7÷0.8÷0.3

66.6666÷12.5÷3.7÷0.8÷0.3
=(66.6666÷0.3)÷(12.5×0.8)÷3.7
=222.222÷10÷3.7
=222.222÷（10×3.7）
=222.222÷37
=(222+0.222)÷37
=222÷37+0.222÷37
=6+0.006
=6.006

In the right triangle ABC, ∠ C = 90 degrees, the bisector of ∠ A and the bisector of the adjacent complementary angle of ∠ B intersect point D, then ∠ ADB =?

45 degrees
Proof: for convenience, each corner below is represented by angle + three letters, and 1 / 2 is represented by 0.5
Let the bisector of angle A and BC intersect at point E, and the extension of AB be AF
Angle bed = angle AEC = 180-angle c-0.5 angle a = 90-0.5 angle a
Angle CBD = 0.5cbf = 0.5 (angle a + angle c) = 45 + 0.5 angle a
Angle d = 180 - angle bed - angle CBD = 180 - (90-0.5a + 45 + 0.5A) = 180-135 = 45

For any real number x, the inequality asinx + bcosx + C > 0 (a, B, C ∈ R) holds if and only if?

If C is greater than a ^ 2 + B ^ 2 under the root sign, the asinx + bcosx is transformed into Q sin (x + P) form

In trapezoidal ABCD, the area of triangle ABO is 5 square centimeters, and the length of Bo is 2 / 3 of BD. how many square centimeters is the area of this trapezoid
emergency

A: because: s △ ACD = s △ BCD, so: s △ AOD = s △ BOC, because: Bo = (2 / 3) BD, so: let Bo = 2A, then do = a, so: Bo = 2do, so: s △ BOC = 2S △ doc, so: S △ ACD = s △ BCD = 3S △ doc, so: the distance from point O to CD is h, then the distance from AB to CD is 3h, so: the distance from point O to AB is 2