The radius of a circular water wave increases at the rate R(t)=0.35/secHow fast does the area A(t) of the circle increase when R(t)=1m?帮忙讲解下是问题到底问的是什么,要是能把答案给了更好,

Sat2数学two identical spheres of radius 6 intersect so that the distance between their centre原题Two identical spheres of radius 6 intersect so that the distance between their center is 10.The points of intersection of the two spheres form a circ 英语翻译The electron at the radius r experienced a repulsion from the total charge within the sphere of radius r；charge outside that radius has no net effect What is the rate of change of the volume of a sphere with respect to the radius when the radius is 1）The sum of the area s of two circles is 65pi square feet.The length of a radius of the larger circle is one foot less than twice the length of the radius of the smaller circle.Find the length of a radius of each circle.2) The combined area of a s AP:what is the radius of a cylindrical soda can with volume of 512 cubic inches that will usewhat is the radius of a cylindrical soda can with volume of 512 cubic inches that will use the minimum material? two disks(one radius is R,the other radius is 2R)and a flat ring (inner radius is R,outter radius is 2R) each with the same uniform charge Q.Rank the objects according to the magnitude of the electric field they creat ar point P.(P is above the disks 英语翻译A circle of radius 2 rolls completely around the inside perimeter of a square of side 10.What distance is covered by the centre of the circle? what is the circumference of a circle whose central angle is 60.and the radius is 12ft? The two centers of identical circles are separated by a distance of 17 cm and the radius of one of the circle is 5 cm. 请问radius-to-radius是什么意思?出现在如下句子里：The examples are not representative of specific examples,but rather are illustrative of general hole positioning on a radius-to-radius basis.如果能帮我把这个句子翻译出来 what's the radius of benzene ring?thank you! 英语翻译The required accuracy of taped radius measurements is within 0.1 feet.When taking radius measurements always use a good quality tape that does not stretch.The tape should be graduated in feet and tenths of a foot. 英语翻译1.the height of the atmosphere is about 30km.the radius of earth is 6400km.what percentage of earth's radius is the height of the atmosphere?2.how would the density of air at the bottom of a deep mine shaft compare to the density of the a 英语翻译A uniform distribution of twenty amino acids on the circumference of a magic circle of unit radius was the modification of the idea of assigning the coordinates of the four corners of a square to DNA bases . how far from the centre of a circle is a chord of length 18cm if the radius is 15cm〜答案12cm求过程 two disks(one radius is R,the other radius is 2R) and a flat ring (inner radius is R,outterradius is 2R) each with the same uniform charge Q.Rank the objects according to the magnitude of the electric field they creat ar point P.(P is above the disks If a right circular cone has a lateral surface area of 6π and a slat height of 6,what is the radius?什么是 right circular cone? 一道数学题,用到初级微积分A right circular cylinder is inscribed in a sphere of radius r.Find the lagest possible surface area of such a cylinder.